BMOREstang
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- Jun 2, 2007
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I did not know exactly where to post this topic because it is sort of a problem I am having with my car, but i has to do with regular maintenance. The other day I did a complete tuneup on my car, oil change, fuel filter, wires, coil packs, pcv valve, MAF cleaning, spark plugs, and air filter cleaning, (coolant not done yet lol). In addition to this I decided I would take it a step further and use a 3M complete DIY tune up kit on the car. The kit included a can of manifold cleaner which ran into the car while it idled, fuel system cleaner to put in the gas tank, and throttle body cleaner. The good thing is that after doing the tuneup my check engine light went off and that my car no longer hesitates in the upper rpm range (prbly thanks to the spark plugs), though the bad thing is that my car is idling funny now. Whenever I drive my car and then let off the gas or put it in neutral the rpms will come down very slowly, then sit at about 1500 rpm for about 10 seconds, then come all the down to normal idle speed. Tonight I took the MAF back off and the air filter, rechecked them, then I checked the connections on the intake side and the pcv valve. I did not find anything funny in these areas so I looked at this book that I have to see if it could enlighten me. I went to the throttle body section of the book and it said that throttle body cleaners should not be used on the 4.6L engines because it WILL affect engine performance. :BangHead: ,,,, Right now I am kicking myself in the butt and I am assuming this is my problem. I was wondering if anybody else has had a similar problem, or if anybody can just help me out here. Any advice is appreciated, thank you