Focus Fanatics - View Single Post - cylinder 4 misfire, tried everything (almost)
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Old 04-29-2013, 02:34 PM   #4
sailor
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Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

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I'd say that if you can duplicate the problem by wiggling the harness you may have narrowed down the source of the issue.

Harness issues do NOT fall into a "common failure" category, with the exception of the "pigtails" to the coil or alternator, so I can't confirm this as a likely problem.

Testing it carefully to confirm it's an internal harness issue rather than the harness pulling on a connector with poor contact would be the next step. Only then would you want to "go inside" the harness cover to continue trying to narrow it down.

A number of members have 'peeled back" the harness cover & rewired/rearranged things to create a "cleaner" appearance, so it CAN be done. You'd want to open it up & continue the testing to see which wire or wires is causing your problem. IF you don't get lucky & find a "new" junkyard harness cheap to just swap in.

Most wiring issues happen at or near connectors, that's why I mention checking those areas first B4 diving too deep into the harness itself.

Luck!
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