Can incorrect valve timing lead to incomplete combustion and fouling?

Jan 15, 2023 ... What might've caused this engine to be carbon fouled so badly? It ... spark plugs afterwards. Both can be significantly impacted after ... Oct 12, 2021 ... If the black soot is 'dry', it's a fuel-rich condition in the absence of (significant amounts of) oil entering into the cylinder. A poorly performing fuel pump can cause spark plugs to foul. The plug will have a dusty layer of black carbon deposits. May 10, 2023 ... Yes - had it (and not running due spark plug) a number of times on motorcycles. Sometimes the original will work fine once started with a ... Dec 14, 2022 ... I would download ISTA and get the codes that causing the DTM. Post them here. Did you torque the spark plugs when you installed new ones? Or did ... Jun 23, 2009 ... Carbon fouling is caused by weak spark, wrong plug heat range, and rich conditions. Essentially, you're burning too cool. Need to heat things up a bit. Mar 18, 2020 ... My question is, can this oil consumption cause this bad of spark plugs within about 10K miles or is there other issues that I need to be looking ... ... spark plug because the exhaust smelled quite rich. The plug (original Bosch WR7 DDC4 with two earth points) was heavily fouled with carbon. I cleaned it up ... Feb 17, 2016 ... May not be a fuel problem. Weak spark will cause the same thing, carbon fouling. First question, dry foul or wet? Wet is oily, and could ... Apr 27, 2008 ... If this is indeed my problem (weak ignition) . does anyone have any recommendations for fix/replace?