Check your glow plugs to make sure they are all heating properly, if one is not heating that cylinder will likely misfire until it heats up enough. I can't see what car/engine this is but if it is an om617 like a lot in here, a valve adjustment is never a bad thing to do.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth