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Vtec idles high while in neutral

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Old Mar 9, 2016
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Vtec idles high while in neutral

I swapped a d17a1 from my manual car for a d17a2 that has an auto trans. wiring harness. I have the ecm from the d17a2 in the car. Hooked up the 02 sensors and had it flashed at the dealer and its running great except when I pull it out of gear and coast to a stop light. Rpms settle to idle speed then increase to 1000 to 1100 until I stop. Anyone know why and how to fix this nuisance?
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Old Mar 10, 2016
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Re: Vtec idles high while in neutral

You have a PCM for an automatic trans installed into a manual trans car?
You probably need the correct PCM first.


PCM reset, then idle relearn?
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Old Mar 19, 2016
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Re: Vtec idles high while in neutral

Before a PCM swap, I'd just try the idle re-learn first, and see if that resolves it?
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