My engine is running horribly. It is idling very bad, and backfires when I rev it up. This started happening imediately after I put an open element air cleaner on it. When I was taking the old air cleaner housing off of the TBI unit, I was really rough getting the IAT sensor out of it. I've checked all of the vacuum lines, and havent found a leak.
I know it's not the EGR valve, because I recently installed a new one. I think that it could be the IAT sensor, because while the engine was running, I took it off to see if that would change the idle any. Absolutely nothing happened when I did that. In the past I have had it disconnected and the engine ran badly. Could this be the problem, or should I look into something else?

Any help is appreciated,
Sean

 

sounds to me like youve already figured it out. at least where to start. get a new one and if it doesnt work, take it back.