artismarcell
Registered User
I have a question. I had bought an engine from the death yard and placed it in my T-bird. It is the supercharged version of course. My car runs extremely well, however, the idle is very high. When i start the car it revs up to to 3000 rpms and holds for about 5 seconds. Then it goes down to 2000 rpm and stays there. When I put it in gear, its an automatic, it goes down to 1000 rpm. As soon as I put it back in neutral or Park, it goes back up to 3000 rpm and holds again for about 5 seconds and goes back down to 2000. I know these cars usually idle at about 600-800 rpms. All sensors in the car have been replaced. I did recently replace the throttle position sensor and the air idle bypass valve and I thought that would work, but it didn't. I don't hear any vacuum leaks either. I was however wondering if I put one of the vacuum hoses on wrong or something and if I did could that effect it? It is very frustrating because I can't run the car for a long time at idle because it is so high. Any suggestions what to check? I'm completely out. Also note, the car doesn't have any lack of power at all. It doesn't knock, ping,