my 89 5.0 will not go full throttle. Throttle Body is clean enough to open up just wont go past about 2500 rpm. Need some advise on how to fix it cuz i need the speed. Any help works!
run the codes on the car. That should be your first step in diagnosis. Go to the tech archive. All you need is a paper clip and if your car is before 89 a test light. You will run both key on engine off and key on engine running tests.
It could be a host of different issues . The computer will store any codes and tell you what is not functioning properly.