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Intermittent Idle Issue

4112 Views 20 Replies 9 Participants Last post by  mgkars
Ever since I had my steering pump replace last month, I've had an Intermittent Idle Issue (the 'I' cubed issue?). It is very unpredictable so far. I've had days were it happens all day long, day's where it will only happen once or twice, and I had a stretch of about a week where it didn't happen at all.

Basically what will happen is I stop at a traffic light, I sit for a few seconds and the idle will dip and surge between 400 rpm and 900 rpm. Usually after a dip, the motor will surge and try to settle. You can kinda see it in the video below (it was at night so the video is really dark). Sometimes it will do it for a few seconds and stop like in the video. Other times it will just keep going. Yesterday it was really bad. I even thought it might stall once or twice. This morning the idle seemed solid.

A couple of weeks ago, I was cleaning snow off the Escape as it idled and I heard something that sounded like very faint backfires. I jumped in the car and the idle was jumping slightly. I tried to open the hood and see if I could pinpoint the sound but it only lasted a few seconds.

I did some research and my initial thought was the IAC as that seems to be the problem with 90% of the idle issues. I took it to a mechanic in town and described what was happening. Of course when I took it in the idle was solid. :cuss: He felt because it kept surging the IAC was trying to do it's job and correct the idle. He felt it was probably something else but if it wasn't happening, he couldn't trouble shoot. The check engine light hasn't come on so the issue isn't throwing any codes.

I was wondering if anyone else might have some ideas...

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I have the same problem, and I'm curious to know a solution for it

it idles really low and then starts to jump from 300/400 rpm to about 1000 rpm and seems like it's going to stall but hasn't yet

I have an '03

thanks in advance!
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it's becoming kind of frequent and was wondering what i could do to fix it..
Squishy said:
I don't have my diagrams with me
JP?.. :shades:
jonas1022 said:
Could be a dirty MAF, or a stuck IAC.
is the fix something i can do? any diagrams?
I'll give it a shot this weekend, thanks
I checked the MAF and it didn;t look dirty but I cleaned it anyways. We'll see if the problem goes away...
happened again today, was frustrated so i turned off my engine and when i turned it back on it was gone
it usually happens to my in traffic instead of my driveway today
anyone figure this out?
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