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  Topic Review (Newest First)
04-08-2019 09:45 AM
m3iguy You need to diagnose the problem, and I recommend a compression test first. Other testing to try is removing the upstream O2 sensor and run for a brief period of time, and also a fuel pressure test.
04-08-2019 01:22 AM
Jhildebrand23 I took it to autozone to get it scanned and all I got outta them was cylinder 3 and 4 missfire but 4 seems like everything is fine 3 is having problems Iím getting spark outta of it. Would a clogged cat cause this problem i wouldnít think since itís only running on 3? But just a idea. The car sounds like itís cammed when u get close to the exhaust
04-07-2019 08:46 PM
m3iguy What codes have been set, and have you tested for spark (or have you done any other diagnostic testing)?
04-07-2019 06:10 PM
Cylinder 3 misfire

I have 2010 Ford Fusion 2.5 i replaced the coils spark plugs and cylinder 3 injector and I still have a bad missfire I think from cylinder 3 when u unplug it it runs the same but if u unplug 1,2, or 4 it starts to die out. Anybody got any ideas?

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