Q&A

 Master

It sounds like the code they came up with was a P0306, #6 cylinder mis-fire, An engine misfire can be caused by engine mechanical isues, fuel issues, or ignition issues. You've got to start with the basics, check the engine is mechanically sound (good even compression, no vacuum leaks,valves are properly adjusted (in the case of shim or screw adjusted valve clearances), check the engine's ignition system is good (good spark plugs coils or plug wires where applicable) then the fuel system needs to be tested and inspected to make sure it is operating efficiently. A misfire can be caused by many things but basic diagnostic tests need to be done rather than just trying to guess what the problem is. An engine misfire can be caused by engine mechanical isues, fuel issues, or ignition issues. You've got to start with the basics, check the engine is mechanically sound (good even compression, no vacuum leaks), check the engine's ignition system is good (good spark plugs coils or plug wires where applicable) then the fuel system needs to be tested and inspected to make sure it is operating efficiently. A misfire can be caused by many things but basic diagnostic tests need to be done rather than just trying to guess what the problem is.