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04-30-2019, 12:25 PM
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#1 |
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Registered User
Join Date: Aug 2013
Location: Fort Worth, TX
Posts: 309
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Quadrajet Accel Pump Issue
Rebuilt a quadrajet. Bowls fill as expected. However, the accelerator pump is not working. Took it apart and filled the pump full. Squirts as expected. Back together, nothing. Seems the fuel is not transferring from the bowl to the pump. How does it pass between the two? Is there perhaps a passage in the bottom of the bowl that is clogged?
I am about to give up and put a holley on it. Shame, I know. But I can tune and make a Holley work.
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Zane's 71 Build |
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04-30-2019, 12:28 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,533
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Re: Quadrajet Accel Pump Issue
Did you change out the check valve?
It looks like a tiny round pellet. Could be stuck in place. |
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04-30-2019, 12:32 PM
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#3 | |
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Registered User
Join Date: Aug 2013
Location: Fort Worth, TX
Posts: 309
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Re: Quadrajet Accel Pump Issue
Quote:
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Zane's 71 Build |
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04-30-2019, 12:44 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,533
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Re: Quadrajet Accel Pump Issue
Yup!
Drivers side front of the bowl. Looks like a screw. IIRC use a flat head screwdriver. |
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04-30-2019, 01:00 PM
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#5 | |
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Registered User
Join Date: Aug 2013
Location: Fort Worth, TX
Posts: 309
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Re: Quadrajet Accel Pump Issue
Quote:
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Zane's 71 Build |
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04-30-2019, 01:42 PM
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#6 | |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,314
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Re: Quadrajet Accel Pump Issue
Quote:
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04-30-2019, 03:13 PM
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#7 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 10,948
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Re: Quadrajet Accel Pump Issue
Try soaking the pump in fuel for a day or so. It could also be just plain defective. I went through three new ones a couple of years back before I got one that worked correctly,
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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04-30-2019, 05:12 PM
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#8 |
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Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Quadrajet Accel Pump Issue
Check for a tear in the pump seal rubber.
Lubricate the pump (and spray in the float bowl) with WD-40 when assembling. Make sure you put the spring under the pump. I've seen that missing cause this issue.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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