I own a '98 Ford Contour 4-cylinder. A week ago it was low on power
and running rough, and the check engine light came on. I have access
to an AutoTap diagnostic cable and a laptop and found cylinder #2 was
misfiring.
I changed the spark plugs and cables but #2 is still misfiring. The
old spark plugs all looked about the same. Nothing particularly
different about #2.
(Though now that the new ones are in, I might want to check those..
right?)
So for my next step I swapped the #2 fuel injector with #3, hoping to
see the misfire move from #2 to #3. But after resetting the
diagnostic errors and running again, the misfire remained at #2. So
it isn't the fuel injector itself.
But it could be the electrical driving fuel injector #2, right? How
can the average joe do-it-yourselfer check this? These electrical
connections are all bracketed together. Can I run the car with all
the fuel injector electrical connections disconnected and turned up
towards me? Then use a voltmeter? Do I need to unbracket them so I
can connect #1 #3 and #4, but not #2, so I can check it? Obviously
the engine won't run no cylinders firing... but will the fuel
injectors electrical still work some how?
What other tests can a do-it-yourselfer do to figure out why cylinder
#2 is misfiring?
Thanks for any insight.
Buzz
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