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#10: 03-09-2013, 03:26 AM
David1235102's Avatar
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Location: West Chester, Ohio
Car: 1999 Subaru Legacy L 30th Anniv. Edition
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Originally Posted by Rick Towers View Post
I found this info: this condition can be caused by a Fuel Pump Relay not supplying power to the pump due to dirty contact points inside the relay....(THIS is actually quite common)....locate your Fuel Pump Relay under the hood in the fuse box found there....find the relay....and SWAP IT with an identical one that powers something else......if after you swap them the issue is found it....

Another fueling issue can be that your fuel pump motor gets stuck....If this does the "no start" condition again......locate your fuel tank.....and BANG ON with a 2x4 piece of wood what this does is Jar/vibrate the fuel pump in the tank and many x it will jog the fuel pump motor into spinning again.....IF you do this experiment and the banging the tank trick works.....then its your fuel pump getting "Tired"....

Either the fuel pump cant get power.....or the fuel pump is getting stuck...THESE cover the issue IF it is a fueling problem. THE OTHER....and EQUALLY IMPORTANT cause could be that you aren't getting spark to the plugs....that's a whole other bag of tricks.... IF she cranks over and doesn't start....go back and actually SMELL your tailpipe....LOL....I know sounds silly.....but if you smell unburnt fuel smell.....then it is not getting SPARK.
Hope this helps?
I've already tested fuel pump pressure and the pump is working fine. again, it's only when the car is filled over a half tank of gas; then it randomly misfires and occasionally stops. it always turns back on though. i sometimes got a smell of gas when it was filled over halfway (in the car). Below half a tank of gas, the car runs flawlessly.
I will be sure to check the relay for the fuel pump, but again, I doubt that's the problem because the pump is working fine.

I also don't mean to hijack this thread, I was just having somewhat similar issues.