My old thread on this problem is here : http://forums.stangnet.com/showthread.php?t=696603 I'm starting a new thread because the first few problems i had when i made that thread are gone. I have replaced: 1. TPS 2. Stock Throttle Body now back on 3. IAC 4. Fuel Injector Harness (great shape used one off ebay) because i had a problem with the ground off of this harness. The replacement was in great shape. took about 2 hours to install with little breaks in btwn. i fired the car up and still running rich and its still idling like i have a lopey cam in it. i dont understand.but now when i play with the wires it doesnt effect the idle like it used to with the old harness. so that's good but i still dont understand. 5. Cleaned EGR Valve 6. Cleaned MAF Sensor 7. ECT and ACT Car continues to want to die when you first start it up after sitting for a few hours. If i set the TPS to .98 to 1 and then i try to set the idle with the idle screw at the TB, it will idle at about 700rpm and it sounds like **** and then if i try to make the idle be at like btwn 750-900rpm i can't do it wen i turn the screw it stays at the 700rpm point and then jumps to 1000-1100rpm. its really weird. any reasons for this.. this harness doesnt have a ground issue anymore, but the idle problem is still there and i thought it would of been gone after the harness change. Yesterday I cleared codes and im going to drive it today and tommorow or so and hopefully i get some codes when i check them. just wanted to make this new thread to help clean things up a little bit cause my old thread some of the problems are gone so. Also to add I've went thru the surging idle checklist before i changed the harness out and i did everything it said and im still having problems.