Is it possible to change the idle speed on an 146 1.8 T/S year 2000 with plastic cover.
Ever since ive had the car its had an erratic idle going from almost stall to 2000 rmp.
I have changed the MAF, Plugs, lambda even changed the coil set with one off EBay but all made no difference.
I have just cleaned the butterfly valve on the air intake, that seems to of stopped the revs going up and down but it sits at 3500 revs. I have turned a screw on the side where the butterfly valve is and kept turning untill the revs dropped to 1000rmp. But im not sure if this adjustment has just turned down the revs or if it has changed the air/fuel mixture.