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.

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, 20188 yr by naru

Check the cts.

Its likely the the wire on the engine harness  is broken .  Ill have to trace it .  Thanks  all  .