Night_train01
Member
- Joined
- Dec 27, 2015
I have developed a very erratic idle on my grand national. When the car first starts it ides around 850 rpm, it will do this for a few minutes then all of the sudden jump straight to over 1500 rpm eventually topping out around 2200 rpm. I checked the TPS and at idle it is .40, the IAC with the engine off is 140, with the engine running it is 0. I thought maybe a vacuum leak but I sprayed all connections with carb cleaner and did not see a difference. I am not sure why to try next. Suggestions?