Idle swing!
Idle swing!
(OP)
I have a 94 Transport with a major problem of the idle swinging so bad the engine dies. I have taken it to 3 repair shops and none can fix it. It only does it when cold, after the engine gets past 160' it runs great. New parts include egr valve, idle air motor, o2 sensor, plugs and wires, coolent temp sensor, cam sensor, crank sensor and
upper intake gasket. Any ideas would help. Thanks
upper intake gasket. Any ideas would help. Thanks





RE: Idle swing!
It sounded to me like you were on the right track with the coolant temp sensor and the idle air control motor. What other components are in the idle air control system on that vehicle? Is there more than one IAC valve? Is the IAC valve getting an appropriate signal from whatever controls it (test with multimeter)?
Alternatively, is there a temperature measurement device in the EGR control system?
RE: Idle swing!
Blacksmith