Accelerator pump issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevyman13 · 08-08-2012, 08:50 PM

Hello, I am new to this forum and have a question that I am hoping someone has ran accross before. We have put a new GM crate 350 in a 1970 c10, owner wanted it kept stock, so we rebuilt the carb, cleaned out the manifold and re-used them from the original 307. Works great for about 3 days and then the truck starts bogging down on acceleration unless you very slowly apply gas. We are finding the accelerator pump rubber is swelling up and causing a lack of fuel on accel. We found a company that says this is fairly common with todays ethenol fuel. They had a "Garter spring" equipped pump that was designed to solve this issue. We bought one and sure enough, 3 days later same thing. Any ideas? Anyone have a source for the original style leather puimps? Any help would be appreciated.

airdale94 · 08-08-2012, 09:39 PM

I think all of them have that spring. Supposedly the ethanol fuel ones are blue rubber. I got a kit for mine from these guys but haven't installed it yet.

Mountain Man
479-639-2022

Lee H · 08-08-2012, 10:35 PM

The kit accelerator pumps are generally not ethenal compatible, even though they say they are. You need to order a pump or two from Cliff Ruggles. Google the name and get a good pump.
Posted via Mobile Device

Chevyman13 · 08-09-2012, 12:11 AM

The one I have now with the spring is blue, did not make a difference. Had some with the spring and without, all were blue rubber. I am in California which does I hear, make a difference.
Posted via Mobile Device

SS Tim · 08-09-2012, 12:28 AM

http://www.cliffshighperformance.com...machinesforum/

aussiejohn · 08-09-2012, 12:31 AM

Quote:

Originally Posted by Lee H

The kit accelerator pumps are generally not ethenal compatible, even though they say they are. You need to order a pump or two from Cliff Ruggles. Google the name and get a good pump.
Posted via Mobile Device

Cliff Ruggles is the man when it comes to Quadrajets. He does stock the correct parts that are ethanol compatible. If yours is a Rochester 2-barrel, I'm still sure that he can help you. Call him.

Regards from Down Under.

aussiejohn

Chevyman13 · 08-09-2012, 01:05 PM

Thank you for your help, calling Mr. Ruggles now.

08-08-2012, 08:50 PM	#1
Chevyman13 Registered User Join Date: Aug 2012 Location: Citrus Heights California Posts: 5	Accelerator pump issues Hello, I am new to this forum and have a question that I am hoping someone has ran accross before. We have put a new GM crate 350 in a 1970 c10, owner wanted it kept stock, so we rebuilt the carb, cleaned out the manifold and re-used them from the original 307. Works great for about 3 days and then the truck starts bogging down on acceleration unless you very slowly apply gas. We are finding the accelerator pump rubber is swelling up and causing a lack of fuel on accel. We found a company that says this is fairly common with todays ethenol fuel. They had a "Garter spring" equipped pump that was designed to solve this issue. We bought one and sure enough, 3 days later same thing. Any ideas? Anyone have a source for the original style leather puimps? Any help would be appreciated.

08-08-2012, 09:39 PM	#2
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: Accelerator pump issues I think all of them have that spring. Supposedly the ethanol fuel ones are blue rubber. I got a kit for mine from these guys but haven't installed it yet. Mountain Man 479-639-2022

08-08-2012, 10:35 PM	#3
Lee H Registered User Join Date: Jun 2010 Location: Upland Ca Posts: 4,143	Re: Accelerator pump issues The kit accelerator pumps are generally not ethenal compatible, even though they say they are. You need to order a pump or two from Cliff Ruggles. Google the name and get a good pump. Posted via Mobile Device __________________ 1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703

08-09-2012, 12:11 AM	#4
Chevyman13 Registered User Join Date: Aug 2012 Location: Citrus Heights California Posts: 5	Re: Accelerator pump issues The one I have now with the spring is blue, did not make a difference. Had some with the spring and without, all were blue rubber. I am in California which does I hear, make a difference. Posted via Mobile Device

08-09-2012, 12:28 AM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Accelerator pump issues http://www.cliffshighperformance.com...machinesforum/ __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

08-09-2012, 01:05 PM	#7
Chevyman13 Registered User Join Date: Aug 2012 Location: Citrus Heights California Posts: 5	Re: Accelerator pump issues Thank you for your help, calling Mr. Ruggles now.



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