mstreffo Posted September 6, 2010 Report Share Posted September 6, 2010 My 2005 Cayenne S (4.5) has an intermittent misfire on startup. This is accompanied by blue smoke for the first 10-20 seconds, and then the misfire/smoke goes away. This only happens every 4 or 5 days. Has anyone seen this before? Link to comment Share on other sites More sharing options...
Ern Posted November 22, 2010 Report Share Posted November 22, 2010 I have had the same thing occur. Does not seem to affect the cars performence, but is somewhat embarrassing so to say. One of the reasons I signed on to this forum was hoping to find an answer. I do hope someone can shed some light on this. Link to comment Share on other sites More sharing options...
Rachel Posted November 23, 2010 Report Share Posted November 23, 2010 My 911 and R32 both do this if I have only started them briefly then parked them - like swapping one in and out of the garage. I found that if I let them go through the full warm up cycle for the engine, I don't get the smoke and rich, unburnt fuel smell. Are you only noticing this when you start them after they have been started and stopped when cold? Link to comment Share on other sites More sharing options...
Ern Posted November 29, 2010 Report Share Posted November 29, 2010 This appears to be a problem from short trips or not really getting down on the engine. I took the pepper wagon on a 3 hour trip this weekend and did not notice any smoke at startup all weekend. I think the fact that Ii was able to drive a long distance at 80 to 90 mph on the interstate helped clean out some of the short trip congestion in the engine. Link to comment Share on other sites More sharing options...
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