How does the fuel injection system control the air-fuel mixture?

Apr 8, 2013 ... The resistors are there to supress radio frequency interference, which can cause the TCI to malfunction (weak spark, mis-timed spark), or even ... Sep 25, 2006 ... The Boating Forum - What causes a fouled spark plug?? - I have a 2003 Yamaha 130hp. One of the plugs has a wet tip with carbon build up. Jun 25, 2013 ... Carbon fouling occurs when the spark plug firing end does not reach the self-cleaning temperature of approximately 450°C (842°F). Carbon ... Aug 20, 2014 ... So basically the problem is the same as what my friend experienced. What is not the cause in my opinion: Compression. 6 bar on both sides. It ... Aug 15, 2006 ... ... spark plugs on the L/H side.. ... If that injector is defective and either sticking open or leaking, it could be the cause of your fouled plug as ... Jul 3, 2003 ... I have a recuring problem with #1 plug (front of engine) fouling with carbon from what one would describe as an over rich fuel mix. Mar 20, 2023 ... ... cause... The ... I would not make any change to jetting based on a random look at a spark plug. Yes, there is some carbon on the plug ... 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. ... 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 ... Jan 29, 2022 ... While they do have a lot of carbon on them; I doubt ... You need to determine whether its spark or fuel that is causing it not to start.