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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7speedshop.com -
I'll lean the AFM out 1 notch tommorrow(back to stock)and see what happens. With a normal chip I had to loosen the AFM one notch to get the car running good, but maybe since I have the appropriate chip now I can set things a little leaner.
7speedshop.com -
Why don't you just look for a vacuum leak since that is most likely what it is? That or the ICV is gunked up.1987 E30 325is
1999 E46 323i
RIP 1994 E32 740iL
oo=[][]=ooComment
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This happens to me every time I disconnect the ECU. Sometimes it will take weeks to stop occasionally oscillating at idle.
'88 325is
VP UT of Austin Autoholics
BMWCCA 380364Comment
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okay, so I should just wait a while and see if the idle smooths out, and if it doesn't then I'll resort to leaning it out. I've only started the car about 6 or 7 times and each time only driven about 10miles.
7speedshop.comComment
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okay the idle issue fixed it self, and the cars running good now, got the 1222 CEL code, for a second but it instantly went away on its own and didn't come back. I think all is good now just had to let the ECU learn.
7speedshop.comComment
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