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post #3 of Old 09-19-2007, 08:24 PM
quick5pnt0
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Re: 89 Notch Surging Idle
Quote:
Originally Posted by SMOKE
Hello All-
I did all the suggested idle fixes, but every so often, she shoots up to like 2500 RPM's - and holds steady, then drops.. IAC was changed by previous owner, & looks like a cheapo (no Ford stamp)- but it's clean as a whistle.. At first it would bob between 1500 & 500 up & down, but was better after I cleaned everything & added a MAC CAI intake.. Does everyone agree IAC??
Thanks...
It definitely could be the IAC, but it's really hard to say for sure. Put it this way you wouldn't be the first to have a bad IAC motor that is brand new.



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