A couple of weeks ago, I posted the below, and got a couple of suggestions.
I put the original spark plug back in cylinder 1, checked under the hood in
the dark, disconnected the battery cable so the computer would re-learn the
car, etc. but the miss is still there.  It is intermittent, though, and in
my opinion is spark related rather than fuel related.  The car winds out to
6000+ rpm and seems to run better at higher rpms.

Tonight I pulled the ignition coil modules from _both_ our 2000 Contours,
and found black soot in the connection for cylinder #1 in both cars.  In
fact it was much worse in the SVT (the one not having the problem).  Since
these coils are identical, I am thinking of just swapping them and seeing
what happens.  I'll be sure to put a good coating of dielectric grease on
all the connectors.

Any comments or suggestions?  Where does the soot come from?

Craig

---------------------------------------------------------------------------------------------------------------------------

A little puzzled by this one.  A miss problem that I thought I had fixed
came back.

Last summer our 2000 Contour Sport V6 (2.5L,  5-speed, 60K miles) developed
a miss with an intermittent Check Engine Light.  I took it to the local
AutoZone and had the codes read, and it was a misfire in cylinder 1.

Changing the spark plug did not solve the problem.  The plug I removed was
clean, too.  Since we have _two_ 2000 Contours (the other is an SVT), I
removed the #1 plug wire from the SVT, put it on the Sport, and no more
miss.  So I bought a set of wires for the Sport, and the car ran better than
ever.

Then, this past week, my wife reported that the car "shuddered" some at
idle, and rpms dropped below normal.  A couple of days later, she said the
CEL came on a few times and the car seemed to be missing again.  So I drove
it to work.  Sure enough, the miss is back, worse than before.  Driving it
home from work, the CEL was flashing, which I understand to mean that excess
gasoline is in the exhaust, which could damage the catalytic converter.

Took it back to AZ -- misfire in cyclinder 1.  It hasn't been driven since.

So what do you think?  My first thought is to swap the coil pack from the
SVT to this car, and see if that is the problem.  I doubt that the new wire
or plug would be the cause - too much of a coincidence.  It could also be a
fuel injector problem.

Any suggestions from your experience would be appreciated.  I'd rather not
take it to the local dealership - their service garage reputation is not so
good, and I'm willing to spend a little time.

Craig
[to reply directly, change the VERB to a NUMERAL]