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Corrado VR6 1994 - Hunting When Cold on Tickover - Thoughts


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Engine has been fine last 20k or so miles. Left it for about 6 weeks, not driven. Battery was flat. Started and it now sort of pulses and hunts, very regular, when cold, kind of vrrooom, vrrooom, vrrooom, regular at about 2 second intervals. Stops once car is warmed to operating temp. Black smokes a bit when sationary and revved whilst cold. Seems to be running too rich. Any ideas what could be causing this. Sensor somewhere?. I have a reasonable knowledge of cars and engines but do not know how VR6 cold enrichment works.

On Corrado forum someone said that the ECU needs to 'learn engine again'. does that make sense?

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