Re: [DML] Re: idle problems
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Re: [DML] Re: idle problems




I've seen about five. Still got three of the bloody boxes being looked 
at in an attempt to fix them - the usual "replace all the chips" didn't 
work.

I've also seen a bad ignition ECU that was putting out spurious pulses 
and confusing the idlespeed ECU. I only found the problem because I had 
a digital timing light set to "tach" on #1. It kept flicking from 850 to 
1500 momentarily and back down. The idle was what I'd call "fluttery", 
and the spurios signals wasn't enough to affect the rev counter.

Martin

Dave Swingle wrote:

>
>I've seen (twice) high idle caused by complete failure of the idle 
>control computer (using the term loosely). The test was to unplug the 
>computer, then the car would idle slow and somewhat erratically. 
>Swapping in a known-good box was the diagnostic technique, mostly 
>because I had another one handy. 
>
>Dave
>  
>






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