Hello everyone!
I am looking for some suggestions on where to start looking to fix my current idle issue on my 1991 318is. When I start my car up it idles a little rough around 900 RPM and then after 10-15 seconds and a rev or two it is smooth. As the car warms up the RPM creep up too. When the car gets up to full operating temp the car idles at around 1400 - 1500 RPM.
I just replaced every hose under the intake manifold hoping that this would resolve the issue since the old ones were cracked and dry rotted. When I did all of the vacuum and coolant lines under there I also replaced both coolant sensors, injector o rings, throttle body gaskets, and the intake manifold gaskets. I sprayed a bunch of carb cleaner through the ICV too. Once warm I am still idling around 1500 RPM after replacing all of that.
Any suggestions on where to look next or what to test?
Thanks!
I am looking for some suggestions on where to start looking to fix my current idle issue on my 1991 318is. When I start my car up it idles a little rough around 900 RPM and then after 10-15 seconds and a rev or two it is smooth. As the car warms up the RPM creep up too. When the car gets up to full operating temp the car idles at around 1400 - 1500 RPM.
I just replaced every hose under the intake manifold hoping that this would resolve the issue since the old ones were cracked and dry rotted. When I did all of the vacuum and coolant lines under there I also replaced both coolant sensors, injector o rings, throttle body gaskets, and the intake manifold gaskets. I sprayed a bunch of carb cleaner through the ICV too. Once warm I am still idling around 1500 RPM after replacing all of that.
Any suggestions on where to look next or what to test?
Thanks!
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