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E46 M3 (2001-2006)

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  #1  
Old 05-20-2013, 01:44 PM
texmanmoore texmanmoore is offline
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Location: ********** Indiana
 
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Mein Auto: 2006 M3 convertible
2006 m3 pulsing idle , harder to start

We purchased this car about 6 months ago , so far no problems, However in the last few weeks when I attemp to start it, it wants to start and then die, or starts and the idle pulses up and down for a few seconds then , its all good. Any idea's what going on ?

Thanks Scott Moore
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  #2  
Old 05-27-2013, 07:19 PM
JayMac JayMac is online now
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Mein Auto: what ever starts
Start simple. If you have vacuum leak it will affect your fuel regulator. O2 sensors should be checked, pre cats. If they are off it can affect your cold start. Air filter? Fuel filter? When were they last changed?
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  #3  
Old 06-11-2013, 06:49 PM
JayMac JayMac is online now
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Mein Auto: what ever starts
I forgot to mention to have your coolant checked also. Often overlooked, weak coolant create a current and fools the car in to thinking the engine is hot. It leans everything out and makes it a pain to start, You can get by in the summer but you would be totally screwed in the winter and spend$$$$ before they actually check for that. Ask me how I know?
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