I wanted to share my experience with misfires recently. About a month ago I noticed a few misfires here and there at idle, I was low on fuel so I thought that was the problem. After refueling the problem still persisted and got a bit worse. I thought maybe it was the fuel so once I got the tank low enough I added a can of Techron and a few gallons of fuel from a different station. The misfires went away almost immediately but came back a few days later. There was never no CEL illuminated. I checked the gap on my plugs and I tried the OEM coils I had since I had installed whoosh ones a few months prior, no change. Fast forward to a week ago the misfires were a lot worse and it started to do it more on cold starts. I asked a buddy who works at ford and he told me it could be either carbon on my valves or the injector/s are starting to fail. I decided to clean my Intake valves. When I looked at them the second valve on cylinder 1 had a mountain of carbon. The other ones didn’t seem that bad but did have some buildup on the stems. I turned the engine until the valves were closed, sprayed brake clean, let it soak and hit the carbon with a pick. I cut up a piece of microfiber cloth and with the pick I cleaned the valves as best I could. I also had a vacuum on hand but didn’t use it much. Once I was done and put everything back together I let her get up to operating temperature. The engine seems to vibrate a lot less and runs a bit smoother at idle. So far I haven’t had a single misfire. I hope this helps someone else in the future that might be having this problem.
After
https://youtube.com/shorts/lT44yZZ0uMk?si=ths5tRnXzW2RUQBH Here is a video of the misfires in action.
What I used to clean the valves and mileage
After
https://youtube.com/shorts/lT44yZZ0uMk?si=ths5tRnXzW2RUQBH Here is a video of the misfires in action. What I used to clean the valves and mileage
