I have a 1991 Ford F150 with a 302 in it. I have been having trouble with my truck stalling out at around 60 to 65 mph. It acts like something maybe getting hot and causing the problem. It been back firing and losing rpm's and then coming to a complete stop. I'm wondering if it is vapor
locking or if its my fuel pressure sensor going bad on the throttle body. Does anyone have a clue what might be going on. Thanks

 

Thread moved to 87'-96' section for better response.

Additionally, my first inclination would be the TFI module (ICM), which on your year, I believe is located on the driver side engine well. You can remove it & have it bench tested at most any auto parts store.




If that tests OK, the next would be the PIP sensor (Stator) located in the Distributor itself. Usually the entire distributor is replaced, as disassembly/ reassembly to replace the sensor is way too time consuming & a royal pain in the ***.

Both parts mentioned are know to be subjet to thermal flux failure over time & symptoms for both are for the most part identical. Which is why you would start by removing & bench checking the TFI module (ICM) first.

 

Does it restart right away or do you have to let it cool down? I like to start with pulling codes first but it sounds like the pip and imc as stated in other post. Also Change the fuel filter and measure pressure at the rail.

 

Hey Thanks for the input, I got checking and my TFI module is on the distributor, lucky me. I found some info on how to relocate it, not for sure if I'm going to do that or not. I may just go ahead and replace it, it has lasted for a long time already.

 

Must have been 92' when they went from Dist. mount to driverside wheel well. My 87' is also Dist. mount.

I agree. Not worth the trouble to relocate unless your planning to past the truck onto your kid 10 years from now. Most trucks see the boneyard before those parts fail.

Which gives weight to addressing the fuel filter as a possible cause. Replacement would also be a cheap date. Personally, I don't think that's the problem, but ruling out the cheap & easy is always the way to go first.

 

Here's how you can troubleshoot for the TFI & PIP yourself if you're good w/ a multimeter:
(If not, take it in for bench testing)