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My #2 cyl. is misfiring in 2002 Ford W. Changed plugs, wires, coil etc
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asked
Oct 26, 2018
by
Joseph
how do i solve my misfire problem?
Vehicle:
2002 ford winstar, 3.8l
#2-changed-plugs-replaced-coil-now-po302-multiple-misfire
p0171
p0401
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Oct 27, 2018
by
Carguy1
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HI there,
Since the ignition system doesn't seem to be the problem I would do a compression test on the cylinder that is misfiring. You could also try swapping the coil from that cylinder to the one next to it and see if the misfire moves with it. If it's misfiring at idle, you could also spray some carb cleaner along the intake with the engine running and see if the misfire smooths out, if it does, then there is a leak at the intake manifold gasket.
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