just wanted to conclude that I did in fact foam and it didnt do much, but cleared a nice cloud of smoke, pretty sure this was her first foaming

I always search the web and people dont reply on their end result so I wanted to state I had the coil done, solved most of the codes, but the one I would do first is crank position sensor. I did it and my car is 100% misfire free now, shop wanted to do my fuel pump and they were dead wrong. Its the cheapest and most problem causing combo so pick one up first if you have this issue.

she is clear of codes but after the move I checked the driveshaft and she is a hair away from completely blowing up, on to the next project with the disco... lol

 

Well, it's been three weeks now since my friend changed the O2 sensor. He'd changed both a few months ago but one of his new ones was apparently defective. Same thing happened to me almost three years ago (but I didn't have misfire codes). Not only did it solve the O2 code problem, but it appears to have cured the misfires too.

The only rationale I can come up with for a link between to two might be that the defective O2 may have caused the computer to starve the cylinders on that side for fuel to the point of causing misfires. The clue was that all the misfires were on the same side that had the O2 code being thrown.

 

Update - A couple of weeks ago my truck threw some even-numbered misfire codes (P0302, P0304 and P0308) plus the P1300. My UltraGauge had been showing a pending P0154 (Bank 2, Position 1 O2 Sensor No Activity).

As we talked about previously in this thread last year, it's not obvious why a bad O2 would trigger misfire codes, but the fact that three of the four Bank 2 cylinders had misfire codes simultaneously made me doubt it was plugs and wires.

On that hunch and my friend's experience a while back (documented in a previous post in this thread) I replaced the B2, P2 O2. The misfire codes have not reappeared. I still don't clearly understand how a failing O2 can trigger misfires but it's apparently true.