ivantruckman Posted January 22, 2018 Share Posted January 22, 2018 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. Link to comment Share on other sites More sharing options...
naru Posted January 22, 2018 Share Posted January 22, 2018 (edited) 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 January 22, 2018 by naru Link to comment Share on other sites More sharing options...
DaveT Posted January 23, 2018 Share Posted January 23, 2018 Check the cts. Link to comment Share on other sites More sharing options...
ivantruckman Posted January 23, 2018 Author Share Posted January 23, 2018 Its likely the the wire on the engine harness is broken . Ill have to trace it . Thanks all . Link to comment Share on other sites More sharing options...
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