# TFI Module **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** stalling, sensors, ford, f150\ **Created:** [August 3, 2010, 10:46pm UTC](https://community.cartalk.com/t/tfi-module/52947 "2010-08-03T22:46:59Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![gregfund](https://avatars.discourse-cdn.com/v4/letter/g/439d5e/32.png) [@gregfund](https://community.cartalk.com/u/gregfund)\ **Post date:** [August 3, 2010, 10:46pm UTC](https://community.cartalk.com/t/tfi-module/52947/1 "2010-08-03T22:46:59Z")
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. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 3, 2010, 10:52pm UTC](https://community.cartalk.com/t/tfi-module/52947/2 "2010-08-03T22:52:03Z")
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 ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [August 4, 2010, 12:30am UTC](https://community.cartalk.com/t/tfi-module/52947/3 "2010-08-04T00:30:35Z")
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.) ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [August 4, 2010, 1:14am UTC](https://community.cartalk.com/t/tfi-module/52947/4 "2010-08-04T01:14:32Z")
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. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [August 4, 2010, 2:10am UTC](https://community.cartalk.com/t/tfi-module/52947/5 "2010-08-04T02:10:28Z")
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… ---
**Author:** ![gregfund](https://avatars.discourse-cdn.com/v4/letter/g/439d5e/32.png) [@gregfund](https://community.cartalk.com/u/gregfund)\ **Post date:** [August 8, 2010, 1:16am UTC](https://community.cartalk.com/t/tfi-module/52947/6 "2010-08-08T01:16:20Z")
Yes, applied the dielectric grease. ---
**Author:** ![gregfund](https://avatars.discourse-cdn.com/v4/letter/g/439d5e/32.png) [@gregfund](https://community.cartalk.com/u/gregfund)\ **Post date:** [August 8, 2010, 1:20am UTC](https://community.cartalk.com/t/tfi-module/52947/7 "2010-08-08T01:20:54Z")
I was wrong. The rotor,cap and wires were replaced. ---
**Author:** ![mjgrosso93](https://avatars.discourse-cdn.com/v4/letter/m/41988e/32.png) [@mjgrosso93](https://community.cartalk.com/u/mjgrosso93)\ **Post date:** [August 8, 2010, 1:29am UTC](https://community.cartalk.com/t/tfi-module/52947/8 "2010-08-08T01:29:03Z")
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. ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [August 8, 2010, 2:07am UTC](https://community.cartalk.com/t/tfi-module/52947/9 "2010-08-08T02:07:10Z")
Is the grease dielectric grease or heat transfer grease? they sure don’t look the same.