Originally Posted by usaf

I just purchased a 95 XJS from a dealership, it had been sitting on the lot for a long time, ran great for a couple of days then, when it was cold and first started up ran fine then when you shut it off and restarted it, it would automatically go to 1300 rpm in park or neutral, drop it down into drive would run at about 7 or 800. Well, I first thought it was the Idle Air Control Valve or the throttle position sensor. I cleaned out the throttle body the MAF sensor and put in a new air cleaner. After doing all that, it still wanted to Idle High. The last thing I did, was go to AutoZone and bought a can of Gummout Expert Injector Cleaner, filled up the car with fresh gas and added the cleaner, the car is doing a lot better now since I put the Gummout in the tank, the rpm's are coming down as I drive the car, almost where it's supposed to be, I think it will probably be back to where it's supposed tlo be in about another week if not sooner. After sitting on the dealership lot for a long time everything gummed up. Hope this helps someone out there. Happy Motoring

Originally Posted by usaf

Well, I spoke to soon..after I shut the engine off..I can restart and the rpm will automatically go to 1500 - 2000 and stay there, if I try to press on the accellerator it goes even higher, but doesn't come down, have to shutoff the engine, then wait til it gets cold again, then when I start it up goes to about 1300 then come down as the engine warms up, then I can drive normally until I shutoff the engine, while it warm. Then if I restart it while it's still hot it will go automatically to 1500 to 2000 RPM again. It just will not stay down when it warmed up. Any help would be appreciated.