Hi guys, so last March/April I have cleaned the EGR and intake manifold. After doing so, the vehicle operated much better. One issue since:
After I drive and the engine gets fully warm, and i start the engine again when it is warm, the idle rises gradually to 1200rpm. The RPMs rise very gradually. When the RPMs are at 1200, if i just lightly press the throttle pedal, they fall back to 850rpm.
The AC is off during the high idle. Outside temps above 20⁰C.
I have re-cleaned the egr to make sure it is sealing properly, and it is.
Cleaned the MAF, reset the ECU. Seemed to help a little bit but the issue later came back.
Removed the coolant cap and left the engine to warm up. Don't know if there's a possibility of air being in the system still.
Any tips?