Home » Public Forums » GMCnet » [GMCnet] Need Help on Engine Cold Start
| [GMCnet] Need Help on Engine Cold Start [message #120828] |
Mon, 04 April 2011 15:56  |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Good Afternoon
I need some help/advice on my engine cold start situation.
Last summer I put in Dick Pattersons ignition system, once warmed up, my coach
runs incredible.
The problem is that when I start the engine cold, it is hard to start and runs
like absolute garbage. It's hard to start, floods easy and tough to keep
running until it warms up.
Once I can get it to run without keeping my foot on the gas a a very high RPM,
it will run on it's own but extremely rough.
Then all of a sudden, it smooths out and idles perfect.
I talked at length with Dick and he feels it's a definite fuel problem, I've
tried many adjustments on the electric choke without it making much difference.
One thing is the fast idle doesn't seem to be working either, but I don't feel
that's the problem by itself.
I drove the coach down to Topeka Graphics on Saturday, once warmed up it purrs
and runs smooth as glass, the whole trip was great. When I stopped to take a
break, the only way I could get it restarted was to keep the pedal floored and
then it would take about 30 seconds to get it started and then another 30
seconds to clears out the flooded gas.
Before the ignition change there were no problems starting it at all, but I know
the ignition is great because once warm, it's never run better.
Any ideas, when I pick the coach up in 6+ weeks, this will be the first thing
on my list to tackle.
Thanks for the help.
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| which system? [message #120835 is a reply to message #120828] |
Mon, 04 April 2011 16:58  |
bukzin
Messages: 840
Registered: April 2004
Location: North California
Karma: 0
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Senior Member |
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[quote title=Ray Erspamer wrote on Mon, 04 April 2011 13:56]Good Afternoon
I need some help/advice on my engine cold start situation.
Last summer I put in Dick Pattersons ignition system, once warmed up, my coach
runs incredible.
The problem is that when I start the engine cold, it is hard to start and runs
like absolute garbage. It's hard to start, floods easy and tough to keep
running until it warms up.
Once I can get it to run without keeping my foot on the gas a a very high RPM,
it will run on it's own but extremely rough.
Then all of a sudden, it smooths out and idles perfect.
I talked at length with Dick and he feels it's a definite fuel problem, I've
tried many adjustments on the electric choke without it making much difference.
One thing is the fast idle doesn't seem to be working either, but I don't feel
that's the problem by itself.
I drove the coach down to Topeka Graphics on Saturday, once warmed up it purrs
and runs smooth as glass, the whole trip was great. When I stopped to take a
break, the only way I could get it restarted was to keep the pedal floored and
then it would take about 30 seconds to get it started and then another 30
seconds to clears out the flooded gas.
Before the ignition change there were no problems starting it at all, but I know
the ignition is great because once warm, it's never run better.
Any ideas, when I pick the coach up in 6+ weeks, this will be the first thing
on my list to tackle.
Thanks for the help.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ray could you give us a link to Dick's page so we can
see what you installed?
Any maybe some photos of it in your coach.
Thanks!
Bukzin
1977 Palm Beach
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120836 is a reply to message #120828] |
Mon, 04 April 2011 16:56 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Ray, one simple answer, you have a vacuum problem. Probably has something to
do with the way you have your vacuum hoses connected.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Apr 4, 2011 at 1:56 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
> Good Afternoon
>
> I need some help/advice on my engine cold start situation.
>
> Last summer I put in Dick Pattersons ignition system, once warmed up, my
> coach
> runs incredible.
>
> The problem is that when I start the engine cold, it is hard to start and
> runs
> like absolute garbage. It's hard to start, floods easy and tough to keep
> running until it warms up.
>
> Once I can get it to run without keeping my foot on the gas a a very high
> RPM,
> it will run on it's own but extremely rough.
>
> Then all of a sudden, it smooths out and idles perfect.
>
> I talked at length with Dick and he feels it's a definite fuel problem,
> I've
> tried many adjustments on the electric choke without it making much
> difference.
> One thing is the fast idle doesn't seem to be working either, but I don't
> feel
> that's the problem by itself.
>
>
> I drove the coach down to Topeka Graphics on Saturday, once warmed up it
> purrs
> and runs smooth as glass, the whole trip was great. When I stopped to
> take a
> break, the only way I could get it restarted was to keep the pedal floored
> and
> then it would take about 30 seconds to get it started and then another 30
> seconds to clears out the flooded gas.
>
> Before the ignition change there were no problems starting it at all, but I
> know
> the ignition is great because once warm, it's never run better.
>
> Any ideas, when I pick the coach up in 6+ weeks, this will be the first
> thing
> on my list to tackle.
>
> Thanks for the help.
>
>
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] which system? [message #120845 is a reply to message #120835] |
Mon, 04 April 2011 18:04 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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I installed Dicks HEI Springfield Ignition System and Plug Wires. Can't send
pictures, the coach is down in Indiana getting painted.
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Richard <bukzin@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Mon, April 4, 2011 5:58:47 PM
Subject: [GMCnet] which system?
[quote title=Ray Erspamer wrote on Mon, 04 April 2011 13:56]Good Afternoon
I need some help/advice on my engine cold start situation.
Last summer I put in Dick Pattersons ignition system, once warmed up, my coach
runs incredible.
The problem is that when I start the engine cold, it is hard to start and runs
like absolute garbage. It's hard to start, floods easy and tough to keep
running until it warms up.
Once I can get it to run without keeping my foot on the gas a a very high RPM,
it will run on it's own but extremely rough.
Then all of a sudden, it smooths out and idles perfect.
I talked at length with Dick and he feels it's a definite fuel problem, I've
tried many adjustments on the electric choke without it making much difference.
One thing is the fast idle doesn't seem to be working either, but I don't feel
that's the problem by itself.
I drove the coach down to Topeka Graphics on Saturday, once warmed up it purrs
and runs smooth as glass, the whole trip was great. When I stopped to take a
break, the only way I could get it restarted was to keep the pedal floored and
then it would take about 30 seconds to get it started and then another 30
seconds to clears out the flooded gas.
Before the ignition change there were no problems starting it at all, but I know
the ignition is great because once warm, it's never run better.
Any ideas, when I pick the coach up in 6+ weeks, this will be the first thing
on my list to tackle.
Thanks for the help.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ray could you give us a link to Dick's page so we can
see what you installed?
Any maybe some photos of it in your coach.
Thanks!
--
Bukzin
1977 Palm Beach
Chico California
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
|
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120847 is a reply to message #120836] |
Mon, 04 April 2011 18:14 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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Vacuum is what I was thinking and what Dick Patterson talked to me about. But
why a sudden change after warm up? Could it be the low temperature or high
temperature distributor thermal vacuum switch ??
I'm thinking this has to be an easy fix.
Ray
Ray & Lisa Erspamer
78 Royale Center Kitchen
TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: James Hupy <jamesh1296@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Mon, April 4, 2011 5:56:12 PM
Subject: Re: [GMCnet] Need Help on Engine Cold Start
Ray, one simple answer, you have a vacuum problem. Probably has something to
do with the way you have your vacuum hoses connected.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Apr 4, 2011 at 1:56 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
> Good Afternoon
>
> I need some help/advice on my engine cold start situation.
>
> Last summer I put in Dick Pattersons ignition system, once warmed up, my
> coach
> runs incredible.
>
> The problem is that when I start the engine cold, it is hard to start and
> runs
> like absolute garbage. It's hard to start, floods easy and tough to keep
> running until it warms up.
>
> Once I can get it to run without keeping my foot on the gas a a very high
> RPM,
> it will run on it's own but extremely rough.
>
> Then all of a sudden, it smooths out and idles perfect.
>
> I talked at length with Dick and he feels it's a definite fuel problem,
> I've
> tried many adjustments on the electric choke without it making much
> difference.
> One thing is the fast idle doesn't seem to be working either, but I don't
> feel
> that's the problem by itself.
>
>
> I drove the coach down to Topeka Graphics on Saturday, once warmed up it
> purrs
> and runs smooth as glass, the whole trip was great. When I stopped to
> take a
> break, the only way I could get it restarted was to keep the pedal floored
> and
> then it would take about 30 seconds to get it started and then another 30
> seconds to clears out the flooded gas.
>
> Before the ignition change there were no problems starting it at all, but I
> know
> the ignition is great because once warm, it's never run better.
>
> Any ideas, when I pick the coach up in 6+ weeks, this will be the first
> thing
> on my list to tackle.
>
> Thanks for the help.
>
>
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
|
|
|
|
| Re: [GMCnet] Need Help on Engine Cold Start [message #120849 is a reply to message #120847] |
Mon, 04 April 2011 18:19 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Something sticking or binding when cold and
then suddenly turning loose??
Clean, de-rust, and lubricate moving rods
and linkages etc.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Date: Mon, 4 Apr 2011 16:14:13 -0700
> From: 78gmc-royale@att.net
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Need Help on Engine Cold Start
>
> Vacuum is what I was thinking and what Dick Patterson talked to me about. But
> why a sudden change after warm up? Could it be the low temperature or high
> temperature distributor thermal vacuum switch ??
>
>
> I'm thinking this has to be an easy fix.
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
>
>
>
>
> ________________________________
> From: James Hupy <jamesh1296@gmail.com>
> To: gmclist@temp.gmcnet.org
> Sent: Mon, April 4, 2011 5:56:12 PM
> Subject: Re: [GMCnet] Need Help on Engine Cold Start
>
> Ray, one simple answer, you have a vacuum problem. Probably has something to
> do with the way you have your vacuum hoses connected.
> Jim Hupy
> Salem, OR
> 78 GMC Royale 403
>
> On Mon, Apr 4, 2011 at 1:56 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
>
> > Good Afternoon
> >
> > I need some help/advice on my engine cold start situation.
> >
> > Last summer I put in Dick Pattersons ignition system, once warmed up, my
> > coach
> > runs incredible.
> >
> > The problem is that when I start the engine cold, it is hard to start and
> > runs
> > like absolute garbage. It's hard to start, floods easy and tough to keep
> > running until it warms up.
> >
> > Once I can get it to run without keeping my foot on the gas a a very high
> > RPM,
> > it will run on it's own but extremely rough.
> >
> > Then all of a sudden, it smooths out and idles perfect.
> >
> > I talked at length with Dick and he feels it's a definite fuel problem,
> > I've
> > tried many adjustments on the electric choke without it making much
> > difference.
> > One thing is the fast idle doesn't seem to be working either, but I don't
> > feel
> > that's the problem by itself.
> >
> >
> > I drove the coach down to Topeka Graphics on Saturday, once warmed up it
> > purrs
> > and runs smooth as glass, the whole trip was great. When I stopped to
> > take a
> > break, the only way I could get it restarted was to keep the pedal floored
> > and
> > then it would take about 30 seconds to get it started and then another 30
> > seconds to clears out the flooded gas.
> >
> > Before the ignition change there were no problems starting it at all, but I
> > know
> > the ignition is great because once warm, it's never run better.
> >
> > Any ideas, when I pick the coach up in 6+ weeks, this will be the first
> > thing
> > on my list to tackle.
> >
> > Thanks for the help.
> >
> >
> >
> > Ray
> >
> >
> > Ray & Lisa Erspamer
> > 78 Royale Center Kitchen
> > TZE368V101144
> > Wauwatosa, Wisconsin 53226
> > Email: 78GMC-Royale@att.net
> > 414-745-3188
> > Web Site: http://ray-lisa.page.tl/
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120857 is a reply to message #120847] |
Mon, 04 April 2011 19:10 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
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|
More specifically, the thermal vacuum switch is hooked up to the choke
vacuum pull off on the port that does not get vacuum from the manifold until
the coolant is warm, then the valve opens, vacuum is applied to the choke
pull off, & it runs normally. This is in conjunction with an improperly set
choke butterfly and/or a failed electric choke heater. Just an educated
guess on my part. <Grin> BTDT
Jim Hupy
Salem, Or
78 GMC Royale 403
On Mon, Apr 4, 2011 at 4:14 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
> Vacuum is what I was thinking and what Dick Patterson talked to me about.
> But
> why a sudden change after warm up? Could it be the low temperature or
> high
> temperature distributor thermal vacuum switch ??
>
>
> I'm thinking this has to be an easy fix.
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
>
>
>
>
> ________________________________
> From: James Hupy <jamesh1296@gmail.com>
> To: gmclist@temp.gmcnet.org
> Sent: Mon, April 4, 2011 5:56:12 PM
> Subject: Re: [GMCnet] Need Help on Engine Cold Start
>
> Ray, one simple answer, you have a vacuum problem. Probably has something
> to
> do with the way you have your vacuum hoses connected.
> Jim Hupy
> Salem, OR
> 78 GMC Royale 403
>
> On Mon, Apr 4, 2011 at 1:56 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
>
> > Good Afternoon
> >
> > I need some help/advice on my engine cold start situation.
> >
> > Last summer I put in Dick Pattersons ignition system, once warmed up, my
> > coach
> > runs incredible.
> >
> > The problem is that when I start the engine cold, it is hard to start and
> > runs
> > like absolute garbage. It's hard to start, floods easy and tough to keep
> > running until it warms up.
> >
> > Once I can get it to run without keeping my foot on the gas a a very high
> > RPM,
> > it will run on it's own but extremely rough.
> >
> > Then all of a sudden, it smooths out and idles perfect.
> >
> > I talked at length with Dick and he feels it's a definite fuel problem,
> > I've
> > tried many adjustments on the electric choke without it making much
> > difference.
> > One thing is the fast idle doesn't seem to be working either, but I don't
> > feel
> > that's the problem by itself.
> >
> >
> > I drove the coach down to Topeka Graphics on Saturday, once warmed up it
> > purrs
> > and runs smooth as glass, the whole trip was great. When I stopped to
> > take a
> > break, the only way I could get it restarted was to keep the pedal
> floored
> > and
> > then it would take about 30 seconds to get it started and then another 30
> > seconds to clears out the flooded gas.
> >
> > Before the ignition change there were no problems starting it at all, but
> I
> > know
> > the ignition is great because once warm, it's never run better.
> >
> > Any ideas, when I pick the coach up in 6+ weeks, this will be the first
> > thing
> > on my list to tackle.
> >
> > Thanks for the help.
> >
> >
> >
> > Ray
> >
> >
> > Ray & Lisa Erspamer
> > 78 Royale Center Kitchen
> > TZE368V101144
> > Wauwatosa, Wisconsin 53226
> > Email: 78GMC-Royale@att.net
> > 414-745-3188
> > Web Site: http://ray-lisa.page.tl/
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
> _______________________________________________
> GMCnet mailing list
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120867 is a reply to message #120828] |
Mon, 04 April 2011 19:51 |
Craig Lechowicz
Messages: 541
Registered: October 2006
Location: Waterford, MI
Karma: 0
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Senior Member |
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Ray,
I'm with several people that mentioned it is probably the choke pull-off diaphragm on the carburetor. It's possible that it just coincidently failed about the time you did the ignition changes. To get a good cold start, you want the choke plate fully closed to get a very rich fuel mix. So rich, that once the engine fires, it is too rich to continue to run at speeds much above cranking. (As you get to fast idle, the higher air flow through the engine atomizes and pulls more of the fuel into the engine. During the 1st few seconds of startup with the choke plate closed most of the fuel just puddled in the bottom of the intake and wasn't being burned yet). So, the choke pull-off diaphragm fairly quickly opens the choke about 3/16" of an inch or so as soon as the engine is running, to get a more appropriate fuel mix. If that doesn't happen, it will either stall, or at least run extremely rich, probably putting black smoke out the exhaust. To answer your question, why does it get better after warmup, once the electric choke starts heating up, it gets the choke open to or past the 3/16' or so point, that it was supposed to be at already. Round numbers it might be 10 seconds after initial fire for the choke pull off to get to 3/16" open, and somewhere between 1 and 2 minutes for the electric choke to do so.
Long answer to your question but hopefully makes some sense. Depending on how the electric choke is wired, one short term solution would be to leave the key on for a minute, to heat the choke coil, and then start it. But, if your choke is wired through the oil pressure switch, that won't work. Mine is fed from the HEI lead, so it would.
Craig Lechowicz
'77 Kingsley, Waterford, MI
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120874 is a reply to message #120828] |
Mon, 04 April 2011 20:35 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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|
The other thing to check is the vac hose going to the pull off. Sometimes they split on the back side and look good but won't opperate the pull off. Truly you would need a 1.25" piece of vac hose making this the world's record cheapest repair that could exist for parts and labor. Once that is working (even if you need to replace the pull off) you should check the choke setting, the fast idle speed setting and the unloader adjustment. From what you have said, all of these need some adjustment.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120902 is a reply to message #120857] |
Mon, 04 April 2011 23:36 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""More specifically, the thermal vacuum switch is hooked up to the choke
vacuum pull off on the port that does not get vacuum from the manifold until
the coolant is warm, then the valve opens, vacuum is applied to the choke
pull off, & it runs normally. This is in conjunction with an improperly set
choke butterfly and/or a failed electric choke heater. Just an educated
guess on my part. <Grin> BTDT
Jim Hupy
Salem, Or
78 GMC Royale 403
"" Jim, the thermal vacuum switch controls vaccum to the distributor vacuum advance--a very contentious issue among this crowd. Also, it does not switch during normal operating temps but only when hot and allows vacuum advance during idle conditions for less heat rejection. The choke pull off is not hooked to the thermal switch.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120908 is a reply to message #120902] |
Tue, 05 April 2011 01:33 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
| Bob de Kruyff wrote on Mon, 04 April 2011 23:36 |
""More specifically, the thermal vacuum switch is hooked up to the choke
vacuum pull off on the port that does not get vacuum from the manifold until
the coolant is warm, then the valve opens, vacuum is applied to the choke
pull off, & it runs normally. This is in conjunction with an improperly set
choke butterfly and/or a failed electric choke heater. Just an educated
guess on my part. <Grin> BTDT
Jim Hupy
Salem, Or
78 GMC Royale 403
"" Jim, the thermal vacuum switch controls vaccum to the distributor vacuum advance--a very contentious issue among this crowd. Also, it does not switch during normal operating temps but only when hot and allows vacuum advance during idle conditions for less heat rejection. The choke pull off is not hooked to the thermal switch.
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That is the same thing I was thinking. I did not see the correlation with the carb.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120909 is a reply to message #120828] |
Tue, 05 April 2011 01:47 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
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Ray,
Look at the coil the way it has the end. If a boxed end, you need to
stab the arm in the enclosed end. If it is the one with L end you need
to hook it.
On Mon, Apr 4, 2011 at 1:56 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
> Good Afternoon
>
> I need some help/advice on my engine cold start situation.
>
> Last summer I put in Dick Pattersons ignition system, once warmed up, my coach
> runs incredible.
>
> The problem is that when I start the engine cold, it is hard to start and runs
> like absolute garbage. It's hard to start, floods easy and tough to keep
> running until it warms up.
>
> Once I can get it to run without keeping my foot on the gas a a very high RPM,
> it will run on it's own but extremely rough.
>
> Then all of a sudden, it smooths out and idles perfect.
>
> I talked at length with Dick and he feels it's a definite fuel problem, I've
> tried many adjustments on the electric choke without it making much difference.
> One thing is the fast idle doesn't seem to be working either, but I don't feel
> that's the problem by itself.
>
>
> I drove the coach down to Topeka Graphics on Saturday, once warmed up it purrs
> and runs smooth as glass, the whole trip was great. When I stopped to take a
> break, the only way I could get it restarted was to keep the pedal floored and
> then it would take about 30 seconds to get it started and then another 30
> seconds to clears out the flooded gas.
>
> Before the ignition change there were no problems starting it at all, but I know
> the ignition is great because once warm, it's never run better.
>
> Any ideas, when I pick the coach up in 6+ weeks, this will be the first thing
> on my list to tackle.
>
> Thanks for the help.
>
>
>
> Ray
>
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
> Web Site: http://ray-lisa.page.tl/
> _______________________________________________
> GMCnet mailing list
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120910 is a reply to message #120908] |
Tue, 05 April 2011 01:48 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
|
|
On Mon, Apr 4, 2011 at 11:33 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> Bob de Kruyff wrote on Mon, 04 April 2011 23:36
>> ""More specifically, the thermal vacuum switch is hooked up to the choke
>> vacuum pull off on the port that does not get vacuum from the manifold until
>> the coolant is warm, then the valve opens, vacuum is applied to the choke
>> pull off, & it runs normally. This is in conjunction with an improperly set
>> choke butterfly and/or a failed electric choke heater. Just an educated
>> guess on my part. <Grin> BTDT
>> Jim Hupy
>> Salem, Or
>> 78 GMC Royale 403
>>
>> "" Jim, the thermal vacuum switch controls vaccum to the distributor vacuum advance--a very contentious issue among this crowd. Also, it does not switch during normal operating temps but only when hot and allows vacuum advance during idle conditions for less heat rejection. The choke pull off is not hooked to the thermal switch.
>
>
> That is the same thing I was thinking. I did not see the correlation with the carb.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Need Help on Engine Cold Start [message #120953 is a reply to message #120902] |
Tue, 05 April 2011 03:12 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Bob, I was going on the information that he provided. First, he did not have
the problem before the ignition install. That means that the possibility
exists that hoses were swapped. It is unlikely that the choke pull off and
the TVS both failed at exactly the same time. Easy enough for me to check
when I am looking at the mess that some one else created, but not over the
internet. I figured that if he checked what I suggested, that the fault
would manifest itself during the troubleshooting phase of this exercize.
Yes, all kinds of crazy thinking going on here, but not all of it on my
end.<BIGGRIN>
Jim Hupy
Salem, OR
78 GMC Royale 403
On Mon, Apr 4, 2011 at 9:36 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> ""More specifically, the thermal vacuum switch is hooked up to the choke
> vacuum pull off on the port that does not get vacuum from the manifold
> until
> the coolant is warm, then the valve opens, vacuum is applied to the choke
> pull off, & it runs normally. This is in conjunction with an improperly set
> choke butterfly and/or a failed electric choke heater. Just an educated
> guess on my part. <Grin> BTDT
> Jim Hupy
> Salem, Or
> 78 GMC Royale 403
>
> "" Jim, the thermal vacuum switch controls vaccum to the distributor vacuum
> advance--a very contentious issue among this crowd. Also, it does not switch
> during normal operating temps but only when hot and allows vacuum advance
> during idle conditions for less heat rejection. The choke pull off is not
> hooked to the thermal switch.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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