Re: 94 ford thunderbird 4.6L auto won't idle helpp ;(
Hi, I had the same kind of problem with my 96 Cougar 4.6 V8, I replaced every part I could think of but nothing worked. Then I disconnected the vacuum line that comes from back of throttle body and goes to the vacuum purge system and plugged it. This vacuum line runs along passenger side cam cover where it connects to a hard line running to the front of the car. I believe that the purge solenoid is stuck open causing this problem. Anyway now the car runs great. Hope this helps.