I have a 2004 cadillac deville with the 4.6 Northstar motor. The car started to stumble and stall and hesitate then all of a sudden the engine started to race and run at like 2000-2500 rpm we did find a vacuum leak and fixed that. We tried another TPS, IAC, cleaned the throttle, and checked the codes. It is giving codes p0121, p0171, and po174, and p1101. Can someone please help?
have the same problem?
Friday, March 20th, 2015 AT 6:09 PM