| [GMCnet] Re: - secondary's not opening - more info [message #365674 is a reply to message #365673] |
Sun, 25 July 2021 17:32   |
Nelson
Messages: 120
Registered: August 2014
Karma:
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Senior Member |
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Maybe check for blockage in the exhaust system .
Sent from my iPhone
Nelson Wright
Orlando Fl.
> On Jul 25, 2021, at 6:20 PM, D C _Mac_ Macdonald wrote:
>
> Is your distributor advance working properly?
> Or is it frozen in place with corrosion?
>
> D C "Mac" Macdonald
> Amateur Radio K2GKK
> Since 30 November '53
> USAF and FAA, Retired
> Member GMCMI & Classics
> Oklahoma City, OK
> "The Money Pit"
> TZE166V101966
> '76 ex-Palm Beach
> k2gkk + hotmail dot com
> ________________________________
> From: dave silva
> Sent: Sunday, July 25, 2021 06:43
> To: gmclist@list.gmcnet.org
> Subject: [GMCnet] Re: - secondary's not opening - more info
>
> James Hupy wrote on Fri, 23 July 2021 18:01
>> Also, if you "Stomp" the accelerator clean to the floor at too low of an
>> RPM, it will bog. Feed the throttle in gradually. If that works, then the
>> problem is not in the Carb, but in your foot. If it still bogs, then you
>> have a problem with too weak of a spring on the secondaries.
>
>
> I've taken a few test drives to articulate this problem.
>
> From a dead stop it takes off very smoothly with a light touch on the throttle, if i leave my foot in the same spot it will very slowly accelerate to
> 45 mph or so, but if i give it any more gas it bogs no matter how gently i feather it.
>
> This problem came on over a short period of time.
>
> The coach had been completely gone over in 2013 with a new/rebuilt carb, distributor, wiring etc. It drove up here here to NC from the COOP and ran
> fine. Then it sat until 2020.
>
> When i first took it on there was a lot of cranking and pouring gas down it's throat before it sparked. Then i got it running pretty good with
> fresh fuel.
>
> At that point it behaved like the muscle car it is. When i stomped on the throttle it roared and launched like a 10,000 lb missile.
>
> Then it started having a power loss under load. I changed several dirty fuel filters but that seemed to have little effect. It was getting harder to
> start and had less power.
>
> Then it lost spark. I diagnosed the HEI, installed new components and it ran great, it starts instantly and idles smoothly but this power problem has
> not gone away.
>
> So it appears the ignition problem masked or imitated an intermittant fuel problem but when i got the spark right the fuel problem is still there.
>
> I think i've ruled out issues related to dirty fuel, clogged filter, bad pump, etc.
>
>
>
>
>
>
>
> --
> Dave & Ellen Silva
> Hertford, NC
>
> 76 Birchaven, 1-ton and other stuff
>
> Currently planning the Great american Road Trip Summer 2021
>
> It's gonna take a lot of Adderall to get this thing right.
>
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