fuel tank vent problem - Chevy Impala SS Forum
 
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post #1 of 7 (permalink) Old 10-28-2002, 11:05 AM
artgski
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Car stalls after driving a few miles. Need to unscrew gas cap and purge the gas tank in order to restart the car. Runs fine if I remove cap and vent the fuel tank.
Is there a way to test the vent system? What else could be causing this?

Thanks, Art
94 9C1


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post #2 of 7 (permalink) Old 10-28-2002, 08:59 PM
SSweet9C1
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can't say that i have run into this problem, but why not get a different gas cap?? couple bucks at a parts store.... could the fuel pump be going???
sorry to answer a question with questions, but maybe it will help...
jonathan
post #3 of 7 (permalink) Old 10-28-2002, 10:01 PM
cadscan
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You probably have a clogged return line.. I think the line runs from the charcoal canister in the pass side front fender.. I had a similar problem, but mine was after installing the Walbro pump too low in the tank, it was sucking up the bottom of the tank when it was hot.. I fixed it by drilling a .040 hole in the cap. Get a spare if you do this, you may need it for inspections..

Regards;
John
 
post #4 of 7 (permalink) Old 10-29-2002, 07:19 AM
oinkr2
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When I first read your post I immediately thought it was the charcoal cannister, but I waited for others to chime in. I know that they make a service kit for the cannister.
post #5 of 7 (permalink) Old 10-29-2002, 08:32 AM
artgski
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I tried the new gas cap to no avail. I will check the vent system. How do I verify the charcoal canister is working?

Cadman-You drilled a hole through your gas cap? Is it keeping the water and dirt out?
Currently, I'm driving around with the cap on very loosely.

Thanks, Art
post #6 of 7 (permalink) Old 10-29-2002, 09:04 AM
94 Hooptie Caprice
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What about one of those caps that come with the hole already in it for the gas pump nozzle to poke through. It's got a spring loaded deal to cover the hole. Their shtik is that you never have to unscrew your gas cap again - and have your hands smell like gas. Maybe something like this would offer enough ventilation.

HTH,
post #7 of 7 (permalink) Old 10-31-2002, 08:32 PM
cadscan
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It's a tiny hole. The plate covers it and doesn't really see rain or dirt.. I don't know if you can disconnect a line from the canister. Common sense would say the return line has raw fuel, not just fumes. Maybe leave it exposed and pop the line just when the car wont start, see if it makes it start when you disconnect it..

Search on..
John
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