| Re: [GMCnet] Re: - secondary's not opening - more info [message #365666 is a reply to message #365647] |
Sun, 25 July 2021 06:43   |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
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Senior Member |
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James Hupy wrote on Fri, 23 July 2021 18:01Also, 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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