M3 woes - BMW M5 Forum and M6 Forums
M3 E36 1993-1999 Sedan, Coupe and Convertible (incl. SMG models)

 
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post #1 of 4 Old 5th July 2002, 05:21 PM Thread Starter
m3man
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Question M3 woes

Hi guys, I'm new in this forum. I have some problems with my M3 3.0 and I'm looking for some god sent advice!! When the car is cold there is some hesitation in the low-revs band 2-3k and as soon as it warms up the car is practically dead in that region. Above 5k its fine. Any ideas? The DIS has showed nothing, spark plugs, fuel filter are both new, injectors are cleaned air flow meter is new and still the problem is there PLEASE help!!! Many thanks
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post #2 of 4 Old 8th July 2002, 11:05 AM
Andy G
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Is It the vanos?

Have you had the Vanos checked? mine hesitates when freshly cold at that point, but as soon as the engine is warm, it now performs as normally (after a minute or two), my dealer originally checked the vanos (as this was his original assumption) when it first had this symptom but found that to be ok, when he checked the Lambda probe, that was faulty, it was also shown to have a small air leak, so check all your connections as well. Have you had it looked at by a BMW dealer?
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post #3 of 4 Old 9th July 2002, 03:42 PM Thread Starter
m3man
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Oh god I hope it's not the VANOS!! Its going to the dealer first thing wednesday 8 am. Mine used to do the same thing when cold but now the hesitation is constant. Where should I point my attention for air leaks? As I said the air flow meter is new. Thsnks Andy G for your reply..
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post #4 of 4 Old 9th July 2002, 06:59 PM
Andy G
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the air leaks on mine were from the one of the individual trumpets that feed the cylinders in the end, causing it to run lean throughout the rev range.
The vanos can be the weak link in an otherwise strong package.
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