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1995 Mustang 3.8 Cylinder 4 Misfire

6979 Views 8 Replies 3 Participants Last post by  a94cobra
Somebody please tell me where to go next. Scanned code P0304. I have swapped plugs, wires,fuel injector and the coil. I still have the same problem and dont have the money to just throw parts at it.
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is it overheating?
any white smoke out the tailpipe?
what does the oil & coolant look like?

do a compression test.
Coolant is green and the oil is dark brown. Compression test was 120lbs. I also put a noid light on the fuel injector and got a good pulse. I shot brake cleaner in the intake and it still missed. Wierd thing to was when I pulled the intake from the throttle body it died.
i need compression numbers from all 6 cylinders.

and that's not wierd, that's gonna happen.
If you woulda rode by me on a horse during the rush of 49 and hollered "hey buddy your lookin in the wrong hole" I would have listened. 1 2 4 5 6 are 120lbs or a little better. 3 was at best 5lbs. So the first thing I do now is pull the valve cover and start at the top. But why did the ob2 say it was #4?
thats exactly what i thought would happen...

your misfire is caused by a compression leak, via a blown head gasket.
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