I'll give it a shot. New o2 sensor as well.

 

What brand? Still have your cat?

 

Huges, ya I still have the cat.

 

Hughes???? They have their own brand of O2 sensor?

Checking their site, looks like they sell NGK, which is what is recommended.... so, so much for that thought.

Check the cap/rotor, and wires. Make sure they all look good. (plugs too.)

 

Oh I thought that you ment the air gap. The o2 sensors aren't bosh. I know dodge hates them. They are ngk, that's what was on there before. I cleared the codes and drove it again, this time the p0307 didn't come back. Just the p0300, p0302, and p0305.

 

There is a Tech bulletin in the faq section here for plug wire routing, may want to have a look at that too.

 

Ok, I'll look for that. What happens if you don't have them routed right?

 

Cross-talk. Which translates to misfires/backfires.

 

Which is probably made worse if you have a super-duper ignition coil.

So, has anyone had any luck avoiding this issue with aftermarket plug wires?

 

I have aftermarket ones problem is the same with both setups