Quote
OK, NOW... TODAY'S EVENTS...


I'll throw you guys another bone for food for thought on this one.

When I very first started having problems, once the CEL came on, I had it checked. Cylinder #4 misfire.

Then it seemed fixed for weeks after the plug change.

Well, today the CEL came back on. So I had it checked again. Cylinder #4 misfire again.



Now I'll take you on the trip that has been my thought process.

Please correct me if I am wrong here. I'm thinking the back cylinder should be #4... and if I am thinking correctly, the coil is on top of #4.

This makes me doubt it's the wires a little... more likey a long wire than a short boot.

This also makes be doubt it's the coils... unless these can possibly go bad on one side... else, shouldn't it effect the other cylinder also?

I'm suspecting a loose connection or ground...
Or the #4 injector at this point.


Oh, and I think the mileage is around 108,000.



If you want to rule out the coil then swap the one over cylinder 2 with the one over 4. The plug wires will swap over between the coils. If the misfire moves to cylinder 2 you have found the problem.

And yes, the coil assembly to plug top CAN go bad yet still work properly for the plug attached via the external plug wire.

1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.