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Re: 93 Chevy PU code 54
Quote:
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Originally Posted by jocat54
After I finally decided that the fuel pump was bad and replaced it the service engine soon came on with a code 54 (fuel pump voltage not present at fuel pump sense line for 2 seconds after the ECM has sent the fuel pump on command. Low voltage) this was not there before I replaced the fuel pump. Have tried clearing codes but sets it immediately. Truck seems to run okay-I little longer starting. Any suggestions on how to diagnois this would be greatly appreciated. 1993 Chevy K1500, 350 engine.
Thanks.
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Replace the fuel pump relay
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