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How many miles? I have something very similiar!! (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by tom on August 11, 2001 at 23:50:20:

In Reply to: Re: How would it perform? posted by Keith '88 750il on August 11, 2001 at 23:07:13:

and have taken care of the trail of smoke and rich gasoline smell in the exhaust. Mine backfires sometimes at start off (1 out of 5 or so..), and I've still got the same 'dead spot' then rush of power you speak of, but I get a check engine light when I'm mashing the pedal.

I also get a check engine light 2 minutes after start up, but I can make it go away by increasing rpms to 2400 for about 10 seconds. On the road, as long as I'm above 2400, theres no ck eng light. When 'coasting', the light comes on again just as i begin to add power in the 'dead' spot. Peak Research Tool says Lambda Emission Control.
Just ground the valves and re-calibrated the injectors (10 of 12 failed), and this is the only problem I have left. Maybe someone has a fix for the same symptoms??
'90 750iL 170,000 mi

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