My wifes 88 5.0 (speed density) runs great when it's cold. Once it warms up it runs fine until you start giving it some gas. If your just cruising it's fine but when you start getting on it it bucks and misses. Does anyone have any ideas what could be wrong?

Thanks in advance for any advise

 

Codes?

 

Neutral safety switch, and some emissions stuff that isn't hooked up.

 

Did the problem start after you removed the emissions stuff?

And there's no other codes? No lean cylinders or EGT or anything?

 

The emissions stuff was taken off long before this problem started. I think the problem is solved. I replaced the TFI module and the hall effect switch. On Saturday I drove it getting it fully warm and no problems. My wife and I took it out again today and no bucks or misses. Thanks for at least trying to help. Looking at the computer for codes was our first thought as well. I am not very familiar with fords but my wife told me the TFI is a common problem with mustangs. From searching around on the internet and from looking at this forum we figured it could also be the hall effect switch. Not sure which one was the culprit but it seems to be working.

 

Ford should be shot for the TFI design.