He;p with Idle probs

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Oct 6, 2007 | 11:56 PM

bookum1

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He;p with Idle probs

I have an 01 f250 with v10 112k miles. It idles and runs a little rough. I had my mechanic hook it to their computer and they did some sort of driving test with the comp and it showed no misses at all. Has anyone had this problem.

I purchased the truck recently for a weekend vehicle and would like to get it running smooth.

any help would be greatly appreciated

Oct 7, 2007 | 12:03 AM

biz4two

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From: Albuquerque

Without knowing if the spark plugs and boots have been changed...I would try a couple things...

Take a look at the IAC...it might need a good cleaning. Or need to be replaced. Here is a link in my gallery for the How2 for replacement. https://www.ford-trucks.com/user_gal...&albumid=22274

Also...could be something as simple as your MAF sensor. You can clean it with some electronics cleaner. Make sure...the MAF sensor is completely dry before starting the engine.

Hope this helps...

biz

Oct 8, 2007 | 10:55 AM

Big Orn

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From: NE Texas

Quote:

I had my mechanic hook it to their computer and they did some sort of driving test with the comp and it showed no misses at all.

If it's running rough, and your mechanic hooked it up and shows nothing, there's either something wrong with his unit or he used the wrong unit.

Oct 8, 2007 | 12:20 PM

SLE

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From: North Dakota

or......big Orn......the unit he's using dosen't do all of the diagostic tests. some of the cheaper units are northing more than code readers. My guess (since I replaced one on my car this weekend) would be the IAC. A new one probably isn't more than $50 and they're easy to change. The thing is your mechanic should be able to hook his scan tool up (if it's a decent one) and look at what the expected RPMS should be (whast the PCM is telling the IAC) compared to what they are and then he could check the IAC manualy with the scan tool (if the two rpms differ) to see if it's operating within the correct parameters. Seems odd he wouldn't have checked that.

Oct 8, 2007 | 04:59 PM

Big Orn

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From: NE Texas

That's what I'm talking about, Steve! Just because a mechanic has something to "hook up" don't mean it'll read squat...

Oct 8, 2007 | 05:11 PM

SLE

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From: North Dakota

Boy, I just reread my post, between my poor spelling ability and my fingers going faster than my mind that post wasn't worth a hoot, lol!

Oct 8, 2007 | 09:28 PM

bookum1

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The mechanic I took it to is pretty competent. They have a computer that cost several thoudands of $$$. He is a freind and they found that they did not record any engine missfire. But that's all they looked for. What else shold I be asking them to check