Why does MY BMW 98 528i rough idle?
Had same issue on my 98 528i. Rough idle on cold start then one day it just would not start. Replaced the MAF and car started but the rough idle remained at startup. De-carbed the throttle body and ICV, good for a day then by the second day rough idle again.
Is there a problem with my BMW car?
Running lean (says codes also no backfires out exhaust) >Next morning ok start up but next start up, would crank but no ignition, tow back to shop! >Next morning shop starts car, no issue!? OBDII showed neg STFT short term fuel trims B2 but no clear indication of problem.
How is the idle on a BMW M3?
>Disconnected MAF and engine ran great, so though MAF bad, so bought salvage yd MAF for $150 and things fine, at first, then CEL. At this point with CEL on, idles fine, and press on throttle and response is lumpy.
Why is there no power in my BMW?
>but then CEL went on and acceleration lumpy, also no power. Also on rev down out of gear the tack would sometimes go to zero and stall the engine. As a test, disconnected the CPS and engine would not start (just cranks), so cps is working.
Had same issue on my 98 528i. Rough idle on cold start then one day it just would not start. Replaced the MAF and car started but the rough idle remained at startup. De-carbed the throttle body and ICV, good for a day then by the second day rough idle again.
Running lean (says codes also no backfires out exhaust) >Next morning ok start up but next start up, would crank but no ignition, tow back to shop! >Next morning shop starts car, no issue!? OBDII showed neg STFT short term fuel trims B2 but no clear indication of problem.
>Disconnected MAF and engine ran great, so though MAF bad, so bought salvage yd MAF for $150 and things fine, at first, then CEL. At this point with CEL on, idles fine, and press on throttle and response is lumpy.
>but then CEL went on and acceleration lumpy, also no power. Also on rev down out of gear the tack would sometimes go to zero and stall the engine. As a test, disconnected the CPS and engine would not start (just cranks), so cps is working.