Replaced upper intake and gaskets, TPS, IAC, MAF, MAP, not all at the same time. Has new O2 sensors. Runs fine however sometimes when I take it out of park and put it in gear the idle goes pretty high, I go into neutral and it will slow down then I can put back into drive and it is fine. I thought it might be a defective IAC so I got another new one and it is the same thing. One thing, the battery was never disconnected for any of this work, there is no check engine light. The original upper intake had coolant getting into cylinders from the defective design on the EGR tube, the EGR valve is also new. Any ideas on what could be the issue? An help is greatly appreciated.
Tuesday, May 8th, 2012 AT 12:17 AM