92 Explorer Stalling Problem

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Mar 15, 2003 | 10:42 AM

GavinR

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92 Explorer Stalling Problem

My 92 Explorer has suddenly started stalling.

I borrowed a Snap On diagnostic tool and ran both a KOEO and KOER tests. KOEO had no codes. KOER had code 412, can not control idle. I could've told it that!

My question is, Why Not? I've checked out the IAC valve and tryed substituting another one but no joy. There is 12.8v present at the IAC with the key on.

Has anyone had a similar problem? Does the PCM use anything else to control the idle?

Please help!

GavinR

Mar 15, 2003 | 12:48 PM

ThePheonixx2

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From: Fayetteville, NC

92 Explorer Stalling Problem

well i know i have a 94 that has a screw near the throttle body. if it's set too low the engine will stall. not much help i know but hey i tried.

Mar 15, 2003 | 04:03 PM

mrshorty

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From: UT

92 Explorer Stalling Problem

don't dnow the details, but could there be crud in the air passages that lead into the IAC valve?

Mar 15, 2003 | 05:49 PM

GavinR

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92 Explorer Stalling Problem

Thanks guys, I will check both those things tomorrow and let you know.

GavinR

Mar 16, 2003 | 07:15 PM

GavinR

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92 Explorer Stalling Problem

OK, I've tried both of those ideas but no joy. I could raise the idle up but put it in drive and it will still get dangerously low (400rpm) or stall. The intake manifold is completely clear.

Also when I start from hot now it's misfiring for a minute or so.

The diagnostic tester is still coming up with code 412.

Any more ideas, I'm clean out!

Regards

GavinR

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