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Message: <blockquote data-quote="tbk1981" data-source="post: 1310413" data-attributes="member: 20276">@ toyman - In the original post I put IAT, I meant to put IAC. Sorry for the incorrect information.@ 5litrarag - I had been driving it on and off for about 2 months with no issues. On the way to meet my buddy it drove just fine. It wasn't until I was trying to crank the car and leave when it started acting up. Any kind of acceleration kills the car. The longer it runs, the worse it gets. I have begged local Mustang guys to help me out but a lot of them don't really care for me because I have a fully built Neon SRT4 which is more hated than Hondas. Once I start the car, it has a hard time holding at idle. Doesn't matter if the jumper plug is out and base timing is dead on at 14 degree or if the jumper is in and the computer is trying to control the idle. At operating temperature, if ANY KIND of throttle is used, it backfires through the intake. Now, if I adjust the timing, I can get a halfway decent idle. Again though, if I rotate the distributor to the right it will backfire through the exhaust. There is literally no medium as to where it wont backfire at all. It stinks to hell and back of gas too. No codes are being thrown at all so there is no way to get any hints on the root cause. Like I said too, I have EVERY VAC LINE tied or clamped, and has all 100% new trickflow gaskets. No overheating. Oh and I don't know if its just because the car seems like its going to die but the volts on battery drop occasionally. The red LED on the Crane ignition controller blinks intermittently... Its been an ongoing battle so some things I may forget. Please question what I am saying because I am FAR from an expert on these cars as it is my first v8 ive ever built!</blockquote>