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Re: 91 1.5 Idle Surging.code 10
the iat needs to be tested at room temp, around 70 degrees. you need to measure resistance on the to terminals coming out of the iat they should be around 1-4 ohms. I'm having this same problem on my 88 1.5 and I can't seem to figure it out. I replaced the eacv last night and the car ran fine for awhile then I shut it off and about an hour later restarted and it started surging again. I can unplug the eacv and the idle will go down to normal, does yours do this also?
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