Engine dies when letting off throttle - Team Camaro Tech
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post #1 of 4 (permalink) Old Aug 31st, 06, 07:59 PM Thread Starter
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Join Date: Aug 2004
Location: Santa Cruz,Ca
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Engine dies when letting off throttle

Hey all,I have a 68 with a 327 and a holley 650 double pumper.It has been running fine while I have been working on it in the driveway.Finnally put it on the road,ran well for first 10 mile trip,took it for another trip right after that car runs well,it has a turbo 350 I was doing 35mph down the road took my foot off the gas and the car died? pulled over car started right back up,did this a couple times till i coasted to a gas station thought i was about out of gas.Put in 10 gallons car did it again.There was a lot of pressure out gas cap but that seems fine from what I have read.I have a manual fuel pump,I thought that when they go bad its all at once?I know my float bowls are a little high would they do this?I had the tank out and it did not seem there was debris in it,plus the car starts again.One more little tid bit the last time when I went to start it nothing not even a click I am thinkin that is because my starter got hot?It seemed to be running about 180*?
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post #2 of 4 (permalink) Old Aug 31st, 06, 09:53 PM
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Re: Engine dies when letting off throttle

Sounds as simple as the floats too high. You can't set a Holley by the dang bowl sight plugs--if that's that you did SC--because they will ALWAYS be too high. Try turning the float needles 3/4 to 1-1/4 turns to the right to lower the float levels. This may cure your problem.
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post #3 of 4 (permalink) Old Sep 2nd, 06, 05:54 AM
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Join Date: Oct 2005
Location: Rhode Island
Posts: 1,356
Re: Engine dies when letting off throttle

IMO, you have a few possibilities here. Could be:

1) carb needs rebuilding
2) clogged fuel filter
3) vacuum leak somewhere
4) rubber fuel hose (front or rear) cracked and allowing air
5) fuel pump on its' way out
6) clogged fuel tank pickup screen

Should be a relatively easy fix. Please post results...........


Dave F. in Rhode Island
'68 Camaro SS Accel DFI 454 (SOLD - I'm a boring Corvette owner now)
Bought my first big-block Chevy in 1970
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post #4 of 4 (permalink) Old Sep 2nd, 06, 09:19 AM Thread Starter
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Location: Santa Cruz,Ca
Posts: 168
Re: Engine dies when letting off throttle

Readjusted floats...but I am sure the problem was a clogged fuel filter! Thanks for the help
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