drew94stang

i have a 94 5.0 and it's cutting out above 4000rpm,i have done a full tune up plugs wires cap rotor and coil however it's still doing this and from some posts i've read the tfi modulemay be the problem,only thing is i can't locate the damn thing.does anyone know where it is?i've already ran the codes and nothing is coming up,i've unplugged mass air and egr valve and they're working properly,someone please help this is aggravating.

AdderMk2

TFI module isnt a common problem in the SN-95. But its on the passenger side fenderwell under the intake tube. It SHOULD be black, and be sitting in an aluminum heat sink.

Do you still have the stock cats?

drew94stang

yeah i still have stock cats but it's not them because they don't get hot or anything like that,usually if it's your cats they would be red hot i would think.thanks

AdderMk2

how many miles do you have on your car.... humor me, don't ignore my questions/suggestions

drew94stang

120,000 i changed tfi module and it still has same problem.thanks

AdderMk2

didn't I tell you not to do the TFI???


i still have my money on the cats... If you can get one of them out... try removing one of your front O2 sensors, then take the car for a quick jaunt... I bet it runs up higher in the RPM's

I had the same exact problem with my cobra. Turned out that my stock cats were broken up and clogged

drew94stang

what kind of cats did you go with after you found problem? did you use an offroad h pipe or one with 2 cats?thanks for your input,so you are sure your car was doing the same i'm telling you mine is doing?it brakes after 4000rpm,kind of like the rev limiter is kicking in.

AdderMk2

yup, exact same symptoms...

and I went with an offroad pipe

rmodel65

yeah when i had problems with my cats it was similar to this. but mine was only on warm days.

AdderMk2

I had the cat break up in my fathers 2000 S10. It wouldnt rev over 1600. I removed one of the front O2 sensors, and the truck INSTANTLY got better. I chopped the cat out of the pipe, looked inside, and it was all broken up and melted...