The two wire plug to my idle air control valve ......... the ground wire was showing open . I had 11.6 volts to the positive side . so I just grounded the ground wire to the engine . now it has weird idle issues . does the ground wire go thru the ecm . . it runs better un hooked . just wont idle when cold. and starts hard . arrgggg.
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1991 loyle spfi iac wiring
Posted 22 January 2018 - 04:09 PM
Yes,that is normal,the ecm controls it by controlling the ground connection.
Don`t ground it.
Check the cts.
Try w/it unhooked.See if that changes the cold idle
w/the IAC plugged in.
Edited by naru, 22 January 2018 - 04:11 PM.
Posted 23 January 2018 - 08:53 AM
Its likely the the wire on the engine harness is broken . Ill have to trace it . Thanks all .
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