ROCHESTER QUADRAJET pumping issue - Holden Technical Talk

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Fastlane » Holden Forums » Holden Technical Talk » ROCHESTER QUADRAJET pumping issue

ROCHESTER QUADRAJET pumping issue - Won't pump fuel

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Johnney		#1 Posted : Wednesday, 4 December 2024 7:13:49 AM(UTC)
Rank: Newbie Reputation: Groups: Registered Joined: 4/12/2024(UTC) Posts: 1 Location: Victoria		Hi all, I just took the top off my quadrajet rochester to clean the fuel bowl as the float was sticking,it seems to pump fuel when you depress the plunger with the lid off, when I put the top back on it won't pump, any ideas.was ok previously.
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Dr Terry		#2 Posted : Wednesday, 4 December 2024 8:46:00 AM(UTC)
Rank: Veteran Reputation: Groups: Moderator, Registered Joined: 1/03/2005(UTC) Posts: 6,064 Thanks: 1 times Was thanked: 203 time(s) in 184 post(s)		The nozzles must be blocked. That's the only thing you've changed by removing the carby top. BTW, I've never seen a float "sticking" in a Quadrajet, they usually become porous & sink, making the carb run overly rich. Dr Terry
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Smitty2		#3 Posted : Wednesday, 4 December 2024 2:27:09 PM(UTC)
Rank: Member Reputation: Groups: Registered Joined: 6/07/2019(UTC) Posts: 384 Location: bayside Melbourne Thanks: 238 times Was thanked: 28 time(s) in 28 post(s)		Originally Posted by: Johnney Hi all, I just took the top off my quadrajet rochester to clean the fuel bowl as the float was sticking,it seems to pump fuel when you depress the plunger with the lid off, when I put the top back on it won't pump, any ideas.was ok previously. firstly, why clean the fuel bowl? ....isn't there a fuel filter in line somewhere? (externally or in the carb inlet fitting?) should be! and also don't get the comment ' seems to pump fuel when you depress the plunger with the lid off but when you replace the top back on it won't pump' You have to replace the accelerator pump plunger in its bore BEFORE you put the gasket on and replace the top airhorn cover and have the fuel bowl FULL of fuel Edited by user Wednesday, 4 December 2024 2:28:55 PM(UTC) \| Reason: Not specified
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