i,m going to need a good wire man for this
started up my engine last week after a complete top to botom rebuild(92 saph 4x4 with L8 ,STG 1,done all the work my self except for the rebore.and she ran first turn of the key and was spot on,no bangs,clatters,or overtemps.
but the idle speed control valve appears to be on full duty cycle when started from cold its grand but while warming up it dosent trim back so when fully warm unless i disconnect it the idle speed ends up at 2500 rpm .when its disconnected the idle speed is perfect.when the ignition is just switched on you can here a slight buzz of the valve.
secondly i cannot get the aircon to engage,the system works perfect if i manually earth the relay called "idle speed compensation relay"which appears to look for an earth through pin 12 of the ecu this relay despite its name when earthed actually supplies the live feed for the clutch on the aircon pump .are to two problems related? pin 34 is the earth for the iscv.any comments would be greatfull