Thanks for the reply!! The engine intermittently runs rough at idle when hot. And when cold(below 50 degrees f) it seems like a couple of cylinders are blowing a whitish/blue smoke for a few seconds then it clears up.
I wondered if the nozzles are not atomizing the fuel good enough to fire properly when cold. It does this unless I cycle the key switch two times when it is 50 deg. and three times under 40 deg. Also on rear bumper it will get a little soot film on it.
I had the timing checked at a MB dealer it was ok. Power is good, boost is about 10.5 psi. No exhaust leaks. I even had a freind follow me and when cruising at 60 mph there is a little cloud around the tailpipe about 8" in dia.
I suspect this is normal but I would like to improve the smoke at start-up and the rough idle.Thanks for any ideas!!!!
