TFI Module

stalling
ford
f150
sensors

#1

I have replaced the TFI Module 4 times and my truck is still shutting down after running about 20 to 30 minutes. After I let it cool down, it starts and runs fine for another 20 to 30 minutes. This is a common problem for the 1988 Ford F150. No one that I have talked to seems to have a solution. If you have one, I would love to hear from you.


#2

You are appling the dielectric grease to the module before installing it? If not, this will cause the module to get hot and cause it to shut down.

Tester


#3

Agreed about the grease and on the offchance the modules are not failing and that the issue is a lack of spark you should consider the possibility of a failing ignition switch.

When it quits you might probe the coil connector and make sure power is provided in both the RUN and the START positions. (red/green wire?)

If everything fine there then maybe the pick-up coil inside the distributor is failing.
(Hall generator coil or whatever one wants to call it.)


#4

Replace the distributor. The pickup coil is likely failing but requires special tools to replace. Many always replace both parts when either is the apparent cause for the problem.


#5

Next time it quits, check and see that you have fuel pressure and flow to the injectors…It could be a failing fuel pump or debris in the tank…


#6

Yes, applied the dielectric grease.


#7

I was wrong. The rotor,cap and wires were replaced.


#8

It won’t be a fuel problem. Its your ignition. Replace your coil. Its in your distributor cap i think. If not the wire on top of the cap in the center leads to it. This is more than likely your problem.


#9

Is the grease dielectric grease or heat transfer grease? they sure don’t look the same.