94 F150 starting issues

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Apr 26, 2014 | 11:45 AM

Will5o5

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94 F150 starting issues

I have a 94 F150 with a 302, 140k miles. The truck used to fire up with a tap of the key, now it has to be cranked anywhere from 3-5 seconds. It seems to help if I bump the ignition a few times, then it won't crank and it fires up like it used to. It runs completely fine, seems like the idle is getting a little rough though. Changed the plugs, fuel filter, battery. I don't think it's a fuel issue because it does it randomly hot or cold on either fuel tank and even after priming the pump by cycling the key a few times. Any advice would be helpful, don't feel like replacing a starter, thanks..

Apr 26, 2014 | 03:00 PM

subford

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From: Easton,Ks

Why would you replace the starter?
It has nothing to do with your issue.

Sounds like you may have a bad check valve in one of the FDM or the FPR is not seating all the way.

Apr 26, 2014 | 03:05 PM

Will5o5

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Any way to diagnose? I know there's an issue with the check valve in the rear tank, it always pumps to the front.

Apr 26, 2014 | 03:51 PM

subford

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From: Easton,Ks

Then you have a bad check valve in the front and not the back.
Maybe your whole problem.

Apr 26, 2014 | 03:56 PM

Will5o5

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Even though it has the issue no matter what tank I have it on?

Apr 26, 2014 | 04:12 PM

subford

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From: Easton,Ks

It should run OK on the front tank and poor on the rear tank unless the rear tank also fills while on the front tank.

But anyway you have a problem with the front FDM and you need it fixed.