01/17/2026
This week's common problem was random/multiple cylinder misfire issues. Some constant misfire issue vehicles and a few only on warmup. These are some images of direct injection fuel injectors as well as some images of the intake side valves the misfires were due to buildup of carbon on both the injectors as well as the intake valves. Its important to have the proper maintenance and cleaning on direct injection vehicles as it can and will cause catastrophic internal engine damage due to poor fueling performance and improper valve seating final image of a clean injector for comparison. Take care of your car and it will take care of you!
