Hey guys, a while back i was having problems idling at stoplights. The rpm's would surge from 600 to about 1100-1500 and the car would jump out from under me, which was followed by the "service engine soon" light. Well at first it only did this when the engine was cold and only every once in a while, but progressed to just about every stop whether the car was warm or not. I replaced my dirty old airfilter with a new k&n open element and the problem stopped. I finally got around to flashing it today and it was code 54...Low voltage at fuel pump OR
Low voltage at Fuel pump relay OR
Output failure at quad driver module


Question is this...since i dont have the problem anymore do i need to worry at all? Or should i just clear the code and go on my merry way...sorry this is so long just wanted to explain full situation.

 

Well guys???

 

Josh,

If it ain't broke, fix it until it is...

OR, you can wait for a few more engine cycles and the code will be pushed out of memory. The ECM retains errors for the last 50 engine starts, or about two average weeks of driving.

If the symptoms are gone and the car is running well, disregard the code but make a note of it un case the problem arises again.

Incidentally, a '54' can also be a Mixture Control solenoid failure on a carbed engine, so replacing the air filter might have moved the wiring enough to make some difference. Either tha, or the filter was restricted enough to force the mixture control into a constant lean condition.

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Later,
Vader
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"No matter how hard you try you can't stop us now"
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