M20 engine starting problem - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 05-20-2004, 05:11 AM
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when i turn over the engine i usually have to let it crank for about 10 seconds then when it starts it idles roughly,

but if the car is cold and it does start in the first second like a normal car , the engine revs up to about 1200 rpms like the choke is on for a few seconds then slows down to normal.

my guess is its a fuel problem throttle sensor, cold start injector or maybe O2 sensor

any ideas?

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