Misfiring after changing parts
2003 Ford Fusion 1.4

2 points

Problem added: Aug 15, 2009 (11 years ago)
car has had new coil pack, new spark plugs and new ht leads, but is still misfiring on the 1-4 plugs, can anyone help or is it to be a trip to the gagarge?

Car details
Car: Ford Fusion
Variant: 1.4
Model Year: 2003
Category: Running Rough, Starting & Power Loss
Replies and Fixes
Top Fixer
223 points

Aug 15, 2009 (11 years ago)
is it a genuine coil?
Top Fixer
425 points

Aug 15, 2009 (11 years ago)
possibly not switching that side of the coil pack as it does them in pairs ie 1 and 4 then 2 and 3 if you can compare the voltages in the small multiplug that plugs the coil pack in .dependant on year the centre wire of the 3 is normally the supply and the two outer wires are the switching wires,connect a voltmeter between battery live and each switching wire in turn then increase the revs (if your lucky enough to get it to run) the voltage should increase slightly as revs rise.also check the wiring to that plug is not chaffed or burnt for example on egr pipes
2 points

Aug 16, 2009 (11 years ago)
thanks will try it out

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