318ti.org forum - View Single Post - Engine Vibration and Misfire: Possible Causes?

**xxxJohnBoyxxx** · 07-30-2009, 01:28 PM

I've never seen a perfectly smooth running M42 or M44. They all have a slight ruff idle and pop in the exhaust due to the cam timing. BMW tried to get it smoother by dialing out on the cam exhaust degree which hurt a little performance but smoothed the idle a little more. Just my personal experience I've never got mine to idle 100% smooth alway a little pop out the exhaust and tiny shake here and there

Forgot to add my car always idled and ran the best with cheap autolites. Stock and full out turbo....I've run bosch, NGK 2 & 4 prong....they suck and caused mis-fires on my supercharged applications

07-30-2009, 01:28 PM	#5
xxxJohnBoyxxx Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 iTrader: (1) Photo Gallery	I've never seen a perfectly smooth running M42 or M44. They all have a slight ruff idle and pop in the exhaust due to the cam timing. BMW tried to get it smoother by dialing out on the cam exhaust degree which hurt a little performance but smoothed the idle a little more. Just my personal experience I've never got mine to idle 100% smooth alway a little pop out the exhaust and tiny shake here and there Forgot to add my car always idled and ran the best with cheap autolites. Stock and full out turbo....I've run bosch, NGK 2 & 4 prong....they suck and caused mis-fires on my supercharged applications Last edited by xxxJohnBoyxxx; 07-30-2009 at 01:31 PM.