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-   -   91 f150 engine help. (https://www.f150forum.com/f10/91-f150-engine-help-214382/)

91fordf150 06-16-2013 02:33 PM

91 f150 engine help.
 
i have a 91 f150 2wd 4.9 manual and a couple months back i changed all the spark plugs and wires, and even replaced the distributor cap. i had it running a couple weeks ago then it started missing out so i went and bought a new TFI module. i go out today and it will turn over but it wont start the motor spins really fast, so i checked all the wires and they was snapped in place, after about 30 min i got tired of messing with it and took the wires off and the spark plugs out and all of them except #4 was soaked in gas. has anyone have a problem like this before? i really need to get this truck running.


thank you for reading this and any advice would be helpful :D

Aktech 06-16-2013 02:45 PM

Pull codes and check for spark.

matt8822 06-16-2013 02:56 PM

I had an 88 did the same thing in the driver side under hood above the fender well is a few relays, one of them controls your spark control, the relay is bad I tried everything before another mechanic turned me onto this

Warlockk 06-16-2013 03:07 PM


Originally Posted by Aktech (Post 2773476)
Pull codes and check for spark.

After that make sure the wires are routed correctly and you have the correct TFI.


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