Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hello guys. I need some help on this one... i got misfire on cylinder 1. Code p0301. . I did a compression test on cylinder 1 and 5
They both 150 psi. Like the other cylinders
Swap injector
Swap coil
Check injeror control with the power prove And they all the same
No vacuum leaks .
Maf sensor is new and good working conditions
What else can i check. Thank you
Well i just get back to the truck and hook the scanner. And now the code is on p0305. So i get a good coil swap it in. And boom its working like new. But im still confused. Because all the time was on p0301. And let it seat for 4 days. And now when i crank it. The new code pop. P0305. Thank you for the help
Ford vehicles are notorious for setting misfire codes for the wrong cylinder. When I have a mystery misfire I try to get a “parade” of the coils using a current probe on a scope. You can do that much easier than scoping ign primary voltages. It’s great for narrowing the problem down to one cylinder.
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