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when i rev it in park and its coming down from being revved it sounds like the cai is sucking up a lot of air or blowing it out is that normal on all neons?
Yes that's normal, but I agree with the idea tha it could be your TPS, what I would do is just go and buy a new throttle body off ebay. Here is one for only 25 bucks and either replace the enitre thing or take off the TPS and switch it off. But a rich fuel mixture has something to do with either a Throttle body sensor or your fuel system. http://cgi.ebay.com/ebaymotors/2004-...spagenameZWDVW
Hopefully thats it. good luck, oh and have you changed your spark plugs in a while, a guy I know has a ford ranger and it was throwing the CPS sensor and that was cause one or two of the spark plugs were in really bad shape. just a thought