1988 d100 318 tbi.truck runs perfect. It’s just a long cranking. Any ideas why??????
#11
03-10-2019, 08:46 AM
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where are you testing fuel pressure? i am pretty sure you should be seeing higher readings than that. 14.5 is acceptable to run but the pump should probably be putting out 40-60psi and just returning what isn't needed. you probably shouldn't be loosing fuel pressure immediately. there is a good chance the check valve in the pump has failed.
#12
03-10-2019, 01:47 PM
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. I installed new fuel pump. And replace the rubber hoses going to the top of the fuel pump assembly. And still eight or nine revolutions before it starts. I’m starting to think it’s just going to be one of those vehicles that won’t crank right up. Now if you put gas down the throttlebody it will hit instantly.
Last edited by Sammys68charger; 03-10-2019 at 01:50 PM.
#13
03-10-2019, 02:15 PM
Legend
#14
03-10-2019, 03:07 PM
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Yeah that’s exactly what I was thinking. I switched it out at the same time as I did the pump. I gonna drive around for a day or two and see what happens. Thanks for your reply.
#15
03-10-2019, 03:28 PM
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Yeah that’s exactly what I was thinking. I switched it out at the same time as I did the pump. I gonna drive around for a day or two and see what happens. Thanks for your reply.