rev issue

  1. A

    Engine 1990 Fox wont rev over 3500 RPMS

    Hey guys, I am new to the StangNet forums and I am helping a buddy work on his 1990 Mustang Foxbody 5.0. He purchased the car a couple of months ago and we have been working on this issue occasionally in the evenings. Heres the problem: The car starts and drives fine, with no idling issues...