My car has had 19lb injectors and an M30 AFM for a few months and everything was fine, I upgraded to the 19lb Mark D injector chip about 1 week ago and I think that the ECU has fully adjusted and I'm not getting a CEL anymore. As soon as i start the car when its warm it revs up to about 1200rpms then drops to about 500rpms and then levels out at the normal RPM range, if I sit their for about 30 seconds the rpms will go up and down a little(up and down maybe 100rpms) for about 10seconds and then level out and then every things good. when the car isn't fully warmed up it stumbles a little when I get on the gas. The car drives fine when warmed up besides the idle issue. It smells a little rich at idle but their isn't any black smoke, do I just need to give the ECU more time or do I need to lean things out a little. i've driven about 50miles with the chip.
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Mark D chip idle issue
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Originally posted by Hallen View PostWhy don't you just look for a vacuum leak since that is most likely what it is? That or the ICV is gunked up.
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