5.0S

I have a 95 mustang gt. when I first start it up in the mornings it runs fine. once it warms up to 160 degrees it starts misfiring and having a small jerk at steady speed anybody know what this could be.

dawson1112

Run the KOEO/KOER diagnostics and report back with any codes your getting.

5.0S

I have tried to hook up a code scanner and it wont link to my car for some reason and I have used a jumper wire to run the codes and its not pulling anything up. I'm not sure what is causing the problem.

5.0S

i have replaced the fuel filter, fuel pump, maf, o2 sensors, tps, coolant temp sensor. when i had this problem before but it was worse than what it is now. after i changed the maf and o2 sensors it stopped doing it for awhile now its back but not near is bad as last time.

Urambo Tauro

Just so we're on the same page, are you trying to pull codes from the dead port under the dash, or are you using the proper OBDI port under the hood?

5.0S

I have tries both ports and still no codes

5.0S

When I tried to hook my handheld up under the dash it says can not link to vehicle.

dawson1112

So if I understand you correctly you are able to get the car to go into diagnostic mode using the jumper method it just isnt storing codes?


My first thought is you have a bad PIP inside the distributor. Or your coil is failing once it gets hot.

5.0S

Yes. I will check and replace the distributor. The coil is not old I replaced it not even a year ago. Could it be going bad that soon. Which it is just a stock one.