| High Idle [message #68734] |
Tue, 29 December 2009 09:45  |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Drove the coach the other day out on the local roads, ran great, normal temps, oil pressure. When I took my foot off the gas the engine went to a high idle, around 1000 rpm. Each time I had to tap the gas to get it to idle normal.
Any suggestions as to what would cause this?
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: High Idle [message #68738 is a reply to message #68734] |
Tue, 29 December 2009 10:15  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""Drove the coach the other day out on the local roads, ran great, normal temps, oil pressure. When I took my foot off the gas the engine went to a high idle, around 1000 rpm. Each time I had to tap the gas to get it to idle normal.
Any suggestions as to what would cause this? ""
Other than a sticking throttle (which I doubt) it's probably hanging up on the fast idle cam. That could be due to the choke not fully releasing--is it unusually cold there?
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] High Idle [message #68747 is a reply to message #68738] |
Tue, 29 December 2009 11:15 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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I had exactly the same behavior with my coach. I sprayed a bit of
liquid graphite (for lubing lock cylinders) on the cable at the carb
and my troubles went away.
Ljdavick at comcast.net
On Dec 29, 2009, at 8:15 AM, Bob de Kruyff <NEXT2POOL@AOL.COM> wrote:
>
>
> ""Drove the coach the other day out on the local roads, ran great,
> normal temps, oil pressure. When I took my foot off the gas the
> engine went to a high idle, around 1000 rpm. Each time I had to tap
> the gas to get it to idle normal.
> Any suggestions as to what would cause this? ""
>
> Other than a sticking throttle (which I doubt) it's probably hanging
> up on the fast idle cam. That could be due to the choke not fully
> releasing--is it unusually cold there?
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: High Idle [message #68760 is a reply to message #68738] |
Tue, 29 December 2009 12:15 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Senior Member |
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This morning it was 34 on my back porch, however, the day in question was nice, probably in the 70's. I will take a look at the cable. Really not sure what to look for, another first. <bg>
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| Re: High Idle [message #68770 is a reply to message #68760] |
Tue, 29 December 2009 13:17 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""This morning it was 34 on my back porch, however, the day in question was nice, probably in the 70's. I will take a look at the cable. Really not sure what to look for, another first. <bg>""
When you have the hatch open, take the top off the aircleaner and see if the choke plate opens completely.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: High Idle [message #68776 is a reply to message #68734] |
Tue, 29 December 2009 13:48 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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Senior Member |
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Heh, I just tried to start her and now I have another problem.
Insert key, buzzer sounds, turned to start and all dash lights went out and not sounds. no solenoid click nothing, checked ground, tried battery boost, same thing.
BTW, I did lube the throttle/choke assy. Now I need to find out why she does not want to start.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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| [GMCnet] Failure to start, etc. (was: RE: High Idle) [message #68778 is a reply to message #68776] |
Tue, 29 December 2009 13:55 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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A ground or hot connection really is bad when you
try to start it. The great amount of current you
attempt to initiate cause a HUGE voltage drop at
whatever point(s) have the high resistance joint.
Mac in OKC
----------------------------------------
> To: gmclist@temp.gmcnet.org
> From: rm1936@gmail.com
> Date: Tue, 29 Dec 2009 13:48:55 -0600
> Subject: Re: [GMCnet] High Idle
>
>
>
> Heh, I just tried to start her and now I have another problem.
> Insert key, buzzer sounds, turned to start and all dash lights went out and not sounds. no solenoid click nothing, checked ground, tried battery boost, same thing.
>
> BTW, I did lube the throttle/choke assy. Now I need to find out why she does not want to start.
> --
> Richard MacDonald
> Punta Gorda, Florida
> 76 Edgemonte
> 94 K2500 6.5 Turbo Diesel Silverado
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