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98 RD688 eradic idle after lift pump change


Dustinj

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Hey guys. First post overs here. Truck runs good and strong. Started running out of fuel like you tirned the key off while driving. I could get it started with ether and it would run fine for the rest of the day sometimes or it would do it again.  Eventually it wouldn’t pickup the fuel so we took it to the mechanic. He replaced the lift pump and pressure relief valve. Now it starts and runs but the idle rapidly increases and decreases. and back up to 1200  I have a video but it’s too large to upload here.  Pm me and I’ll semd it to you  

 

Thanks guys. 

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