Cadillac Seville / Cadillac Eldorado Forum Discussion, ISC Motor in Past Cadillac Vehicle Discussion; I have a 1993 eldorado 4.9 I just replaced the,(ISC) idle speed control and a new TPsensor. I think I ...
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1993 eldorado 4.9
Originally Posted by nickbucciarelli
I have a 1993 eldorado 4.9 I just replaced the,(ISC) idle speed control and a new TPsensor. I think I set ISC correct idle is 800rpms now I have a humming kinda like bad ground. Any ideals???
My ISC motor is working fine I learned the Throttler position sensor sends a reading to ISC. From what I been reading, with key on engine not running set TPS @0.45 to 0.55. That being said I can't get my meter to get that reading can't turn the TPS that low