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Discussion Starter · #1 ·
I have a 1989 d100 5.2 having troubles! 1 question is does a fuel pump relay stay close during entire operation or does it just click on then immediately click off,because I'm not getting volts to the pump now and all I did was replace the rubber hoses that leaked. Prior to that it ran fine. Got any ideas what's wrong before I just throw good money away buying electrical parts I can't return?
 

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It should stay closed all the while when truck is running, or else no fuel to the engine.. I expect it could be the PCM ? check your code also..
 
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