IAC coding?

IAC coding?

Postby Ladybrinx [OP] » February 25th 2012, 5:52pm

I posted here back in the fall of last year thinking this was a Cruise Control issue Well yesterday it did it again, idling at about 2500 RPMs (I don't have a tach) running 40 mph w/ no throttle pressure. CC is still unhooked so it can't be that. Then after about an hour of running around the check engine light came on. Of course it was after all the auto parts stores that would check it for me where closed. So this morning, luckily the light was still on and I stopped in to find out what it was, here's the code it came up w/:
Definition:
IAC circuit condition or idle speed higher/lower than expected (DUH!)
Explanation:
The ECM has detected that the IAC counts are higher/ lower than expected, the engine speed is not in the expected range.
Probable cause:
Vacuum leak on engine
Dirty Throttle body
IAC motor defective
Poor electrical connection to the IAC valve

OK here's my question, are ANY of these things easy enough to fix that I could do it myself? If not I can call my brother to fix it, but he gives me a hard time about it, so if I can do it myself it's just easier that way. None of them sound that easy, so last ditch effort to check before I make that call.
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Re: IAC coding?

Postby paintdrying » February 25th 2012, 6:11pm

Not the brother thing. You will never hear the end of it. Even when your both sitting there in a nursing home. You always want to be careful and take your time. We can walk you through the process. The iac valve is screwed into the throttle body. You can start by unscrewing that and clean only the tip. People on here clean inside the throttle body as well, but I read not to do that. You can also go looking for a broken lose, weak vacuum line. Just get to looking.
There is always the craigslist mechanic. Some of those guys are pretty good. G ood luck
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parts van 2000 astro rwd 279,000 miles
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Re: IAC coding?

Postby Ladybrinx [OP] » February 25th 2012, 6:44pm

LOL you must have a brother like mine, you nailed that one. He's a mechanic, so he'd do it, I just catch a bunch of grief for it, cause he hates working on my van. Likes working on cars w/ lots of room in the engine compartment or at least...more than the van has.
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Re: IAC coding?

Postby RECox286 » February 25th 2012, 9:31pm

Wasn't aware that the Astro and Safari are all that difficult to work on. You just need to be a triple jointed, slim handed, gecko sized....

Ok, so there are some tight spots, but there are tricks to doing some of the seemingly impossible jobs that crop up from time to

time. I've been working on our small fleet of M Vans since 1986, and I actually prefer them to some other types. (Especially

some imports which will remain unnamed.) I've known some pretty good lady mechanics, so don't be afraid that you couldn't

shade tree with the best of us. Just a matter of having the technical know-how to be a Mr. Goodwrench . So, sign on to E-bay

and look for a "Factory Service Manual" (not a Haynes or Chilton) that is made specifically for your year. As far as tools go,

for the most part if you look at Harbor Freight (Look for a retail outlet in your area) they will have most of the common tools

and some of the special tools that you will need for more than a fair price. Figuring that hiring a mechanic will set you back

anywhere from 50 to 100 dollars per hour, investing in tools, manuals and parts will keep your costs down. And the satisfaction

you get from doing it yourself will boost your confidence for getting into some of the more complicated jobs. Of course, there is no

end to the help and advise you can get here on A/S.com. To be quite honest, most of the time the jobs are boringly routine once

you get the hang of it.

Uncle Bob
Start a fire for a man and he will be warm for a day.
Set a man on fire and he will be warm the rest of his life.

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