Can restrictions in the exhaust manifold affect engine performance and spark plugs?

Jan 31, 2020 ... Gentlemen, I have a sooty, carbon-fouled spark plug problem that I ... carbon building up on the exhaust valves causing them to leak. Jul 14, 2021 ... Common types of fouling include lead, carbon, silica, loose debris, and oil. Another common cause of spark plug failure is a cracked ceramic ... 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. Jun 5, 2016 ... I've heard that black carbon on the spark plugs is normally caused by a rich fuel mixture. This can cause the mixture to wash down the cyl. Jun 2, 2021 ... Could it be that an excessively rich idle mixture causes carbon fouling, then the lack of spark allows oil to accumulate? I just want to be ... Sep 22, 2018 ... If all of the spark plugs show heavy dry carbon fouling, the rich fuel mixture may be caused by too much fuel pressure (check for a defective ... May 13, 2021 ... Carbon fouling on a spark plug is caused by a problem with the fuel that you use. Often, we describe it as a fuel mixture that's too rich, which ... Sep 25, 2015 ... Cylinders 2-5 looked normal. What could cause the end plugs to foul? My thought was those plugs stay cooler, and not hot enough to burn off ... Nov 24, 2020 ... Having a bit of a problem with carbon fouled spark plugs on my 1955cc engine in a split bus. It had an external oil cooler and never seems to get very hot. Causes of Carbon Fouling: · Continuous low-speed driving and/or short trips · Spark plug heat range too cold · Air-fuel mixture too rich · Reduced compression and ...