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Quadrajet problems [message #137646]

Fri, 05 August 2011 17:59

kwharland

Messages: 246
Registered: November 2005
Location: Central Florida

Karma:

Senior Member

Unfortunately we left our GMC sit pretty much unused for several years. I did manage to start it periodically and let it get up to operating temps, same with the genset and roof A/C's.

This time I went to take it out for a drive and found that it stalls whenever I touch the throttle. So I pulled the carb, cleaned it and installed new gaskets, accelerator pump and inlet filter. It still bogs and tries to stall whenever I press on the pedal. I'm an adept mechanic but I'm stumped here. I've had that carb off and on a dozen times, cleaned it, blew it out, tweaked it - no change. I know I can send it off but again, I've generally competent and unwilling to simply give up. A good friend and shop owner is out of ideas as well.

The transition from idle to part open is smooth, accel pumps works well, but just beyond barely open it appears to starve for gas. Float level has been checked and rechecked. Meter rod piston rises as expected. Closed off all vac ports with no change.

Ideas?

1978 Eleganza II

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[Message index]

		Quadrajet problems By: kwharland on Fri, 05 August 2011 17:59
		Re: Quadrajet problems By: bwevers on Fri, 05 August 2011 18:01
		Re: Quadrajet problems By: kwharland on Fri, 05 August 2011 21:12
		Re: Quadrajet problems By: GeorgeRud on Fri, 05 August 2011 18:11
		Re: Quadrajet problems By: Dennis S on Fri, 05 August 2011 18:36
		Re: [GMCnet] Quadrajet problems By: Ray Erspamer on Fri, 05 August 2011 21:48
		Re: [GMCnet] Quadrajet problems By: kwharland on Fri, 05 August 2011 22:07
		Re: [GMCnet] Quadrajet problems By: James Hupy on Sat, 06 August 2011 03:58
		Re: [GMCnet] Quadrajet problems By: kwharland on Sat, 06 August 2011 05:58
		Re: [GMCnet] Quadrajet problems By: James Hupy on Sat, 06 August 2011 08:50
		Re: [GMCnet] Quadrajet problems By: kwharland on Sat, 06 August 2011 09:03
		Re: [GMCnet] Quadrajet problems By: James Hupy on Sat, 06 August 2011 09:14
		Re: [GMCnet] Quadrajet problems By: jhbridges on Sat, 06 August 2011 13:20
		Re: [GMCnet] Quadrajet problems By: Les on Sun, 07 August 2011 03:17
		Re: [GMCnet] Quadrajet problems By: midlf on Sun, 07 August 2011 07:46
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 08:58
		Re: [GMCnet] Quadrajet problems By: Dennis S on Sun, 07 August 2011 09:04
		Re: [GMCnet] Quadrajet problems By: Dennis S on Sun, 07 August 2011 09:06
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 10:01
		Re: [GMCnet] Quadrajet problems By: powerjon on Sun, 07 August 2011 12:04
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 12:41
		Re: [GMCnet] Quadrajet problems By: Ken Burton on Sun, 07 August 2011 17:48
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 18:05
		Re: [GMCnet] Quadrajet problems By: kwharland on Tue, 09 August 2011 17:04
		Re: [GMCnet] Quadrajet problems By: Dennis S on Sun, 07 August 2011 09:14
		Re: [GMCnet] Quadrajet problems By: Ray Erspamer on Sun, 07 August 2011 12:39
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 08:55
		Re: [GMCnet] Quadrajet problems By: James Hupy on Sun, 07 August 2011 09:24
		Re: [GMCnet] Quadrajet problems By: kwharland on Sun, 07 August 2011 10:06
		Re: [GMCnet] Quadrajet problems By: Ray Erspamer on Sun, 07 August 2011 12:37
		Re: [GMCnet] Quadrajet problems By: Gary Berry on Sat, 06 August 2011 01:05
		Re: [GMCnet] Quadrajet problems By: kwharland on Sat, 06 August 2011 05:51
		Re: Quadrajet problems By: fred v on Sat, 06 August 2011 09:49
		Re: Quadrajet problems By: C Boyd on Sat, 06 August 2011 10:05
		Re: Quadrajet problems By: PettyVTX on Sat, 06 August 2011 10:20
		Re: Quadrajet problems By: g.winger on Sat, 06 August 2011 10:30
		Re: Quadrajet problems By: klassic kampers on Sat, 06 August 2011 12:28
		Re: Quadrajet problems By: kwharland on Sat, 06 August 2011 12:51
		Re: Quadrajet problems By: JohnL455 on Sun, 07 August 2011 17:21
		Re: Quadrajet problems By: kwharland on Sun, 07 August 2011 17:35
		Re: [GMCnet] Quadrajet problems By: Brian Waddell on Tue, 09 August 2011 21:31
		Re: [GMCnet] Quadrajet problems By: kwharland on Thu, 11 August 2011 19:22
		Re: [GMCnet] Quadrajet problems By: C Boyd on Thu, 11 August 2011 19:51
		Re: [GMCnet] Quadrajet problems By: Ken Burton on Thu, 11 August 2011 23:02
		Re: [GMCnet] Quadrajet problems By: cbwoodsr on Fri, 12 August 2011 07:48
		Re: [GMCnet] Quadrajet problems By: C Boyd on Fri, 12 August 2011 08:01
		Re: [GMCnet] Quadrajet problems By: Ken Burton on Fri, 12 August 2011 15:21
		Re: [GMCnet] Quadrajet problems By: USAussie on Fri, 12 August 2011 21:27
		Re: [GMCnet] Quadrajet problems By: Ray Erspamer on Fri, 12 August 2011 07:43
		Re: Quadrajet problems By: George Beckman on Thu, 11 August 2011 23:27

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