Please help! gas issue - Chevy Impala SS Forum
 
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post #1 of 6 (permalink) Old 11-16-2006, 11:36 AM
96Brougham
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ok so i live exactly 1.2 miles from the 7/11 gas station. i left my driveway puttering, and ran on fumes the whole way there. It literally stalled as i pulled up to the pump. I put 10 gals. in it, and it would start. After trying for about 15 mins, it finally started. Now it runs like SH!T. At idle, its spudderin and shakin like it wants to stall, but when i get on the gas its fine. Any indeas/suggestions????
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post #2 of 6 (permalink) Old 11-16-2006, 12:48 PM
BCs71
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I'd hook up a fuel pressure gauge and see what she is reading. SHould be about 37psi at idle....

Low gas will cause the pump to run warm and possibly fail. Sucking air doesn't do anything for the longevity of pumps, either.
post #3 of 6 (permalink) Old 11-16-2006, 12:55 PM
caddyguy109
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Definately sounds like the pump, especially since it got a little better with some gas in the tank--if always run low too often, they can overheat and go bad, and I had the same issue with mine. Now with the new, now it's never run too close to 1/4 tank, just to be careful.

But still, checking the fuel pressure is your best bet to be sure, as it still could be a number of other little things. Not likely, but better to check.
 
post #4 of 6 (permalink) Old 11-16-2006, 01:05 PM
96Brougham
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how do i check the fuel pressure??
post #5 of 6 (permalink) Old 11-16-2006, 02:12 PM
BCs71
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Need a gauge that reads higher than 45 psi from the parts store.

There is a fitting on teh back of the fuel rail near the firewall. Unscrew the black cap on it and screw in the fitting on the gauge.
Start the engine and the gauge needle will read what PSI you are pushing.
Should be in the 37-40psi range at idle.
If you remove the black vacuum tube on the nearby fuel pressure regulator, the PSI should jump up to 42-ish psi (not more than 48psi).
After you reattach the vacuum tube you can shut off the engine and psi should hold above 33 or so psi for at least ten minutes.
post #6 of 6 (permalink) Old 11-16-2006, 02:17 PM
DBeasst
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Could possibly be a clogged up fuel filter too. When you run the tank dry, you might be sucking sediment and crap into the pump then the filter. That's a relatively quick, easy and cheap thing to try before replacing a fuel pump.

Clogged filter could cause low fuel pressure readings too.

HTH!
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