Ignition Problem

[roworld]

Im having a problem with my 88gt. sometimes it wont rev pass 4k and starts to back fire from the exhaust even while im driving. If I cut the key off then right back on it goes way. I just did the mass air swap and its the same if not worst. Im thinking maybe its a ground problem. How many grounds are under the hood and where are they located. Has anyone else ever had this problem.

 

[jrichker]

The TFI module mounted on the distributor is usually the culprit for a high speed miss on a warm engine. If the problem does not occur when the engine is cold, the TFI module is definitely suspect. You may need a special socket to remove the TFI module, but most auto parts stores will have one for $5-$7.

Be sure to use plenty of the heat sink grease on the new TFI and clean the old grease off the distributor.

View attachment 149432

See Automotive Tools Specialty | Auto Mechanic & Technician Diagnostic, Testing Equipment | Thexton