98 discovery. Recently started running rough. It "cleared up" a few times, almost like it was getting too much few or something. Now it won't "clear up" and I'm not getting spark to two of the cylinders. Standing in front of the rover looking at it passenger side front plug and second from front in driver side. Both on same coil pack. Got a different coil pack, no difference. Tried different plugs, wires, still nothing.

What else should I try?

 

check the plug where the wiring to the coils goes together....possibly one of the wires has come loose

 

I played with that a little, no luck. I suppose it won't hurt to check it out a little more.

 

Any other ideas?

 

Maybe you got a bad coil pack???? Maybe try swapping the coil for one of the others you know is working.

 

That's possible. I didn't think they were interchangeable, but looking at them they're all the same. Thanks for the suggestion.

 

Sounds like the coil packs but I think you can change one that controls two cylinders and not the whole pack. Might be Fords I'm thinking of.

 

You can change one that controls two cylinders. I changed that, nothing. Used a different one on the truck that I know works, still nothing. It's gotta be something with the little orange wire that goes to it, and the little red one connects to the pack before. Does the computer on the passenger side right by the windshield fluid container, I thinks its the EMC or something like that, have anything to do with spark? It's a little corroded, I cleaned it just recently to get the rover to start, which was successful, and ran fine for a few days until it started doing this. I'm stumped.

 

I could be something with the ECM especially if you say the terminals werent very clean. Maybe try cleaning them again and use some dielectric grease when you reinstall. Its definately worth a try

 

what plugs and wires are you running?