Service engine soon light
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Joined: Jul 2006
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Service engine soon light
I am getting the p304 code for the number 4 cylinder misfire.2001 F-150 4.6 with the coil directly over the plug(no wires) Pulled coil and plug. Plug was black and coil looked intact. It runs with a lot of vibration. Not loosing coolant and none on the cylinder or plug as best I can tell. I switched the coil to a diffrent cylinder to see if it followed it, It did not. put new plug in and cleared the code. After a test run it gave the code again. Any suggestions for further diagnosis.
Thanks,
E.L. Williams
Thanks,
E.L. Williams
New User
Joined: Aug 2007
Posts: 16
Likes: 0
From: Hoquiam, WA
try moving the plug to a different cylinder and see if it moves. Nevermind, I see you put a new plug in already. 
Last edited by BigT_2000; Aug 6, 2007 at 10:18 PM. Reason: missed info in original post
