What is a variable valve timing (VVT) system and how does it work?

May 31, 2018 ... If the spark plugs have a matte black or grey appearance, it could be carbon fouling — something typically caused by a fuel mixture that is too ... Apr 27, 2008 ... If this is indeed my problem (weak ignition) . does anyone have any recommendations for fix/replace? Nov 28, 2022 ... I just changed my own spark plugs, and it seems they are Carbon fouled. ... I don't think the condition on these plugs would cause any harm to the ... May 23, 2022 ... ... spark plugs, they foul badly with black carbon after only 20 ... fouling, I was hoping to rule out the original Strombergs causing the issue. Jul 1, 2022 ... ... causes stuck rings and carbon buildup on valves. Burned oil deposits end up in the EGR system and catalytic converters. Yes, even though ... It has a Crane HI-6 ignition and MSD Dist." Well, if it's fouling plugs, (assuming the fouling is from gasoline and not oil, such as caused by bad rings or ... 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 ... Jul 10, 2003 ... Dry black carbon deposits could be an indication of a rich mixture ... More than a quart in 1000 miles is cause for concern in my book. Aug 18, 2001 ... Rich mixture and or rich main jets can cause the carbon/plug problem but if its really bad enough to cause a problem you should see black smoke. Jul 6, 2015 ... What bike? Forget the electronic ignition for now. Get it right first, otherwise you are introducing new variables. Carbon fouling is a result ...