P0352 and strong misfire

[Kendellgil]

1997 5.0 explorer. Everything was going good, I accelerated through a yellow light and coasted into a parking lot and when the engine rpm got down to idle speed it started missing. Pulled it into a parking spot the misfire was constant, went inside and got the shopping done came out and it started but the miss was still present, had to drive with od off to help keep the load on the engine down to keep it smooth. I swapped both igniton coils with known working coils, and the miss is still present.

Is 352 pertain to a certain cylinder? also does anyone have the information on how to test the wires going to the coil pack? Btw I just changed plug and wires about 1,000 miles ago with platinum motorcraft plugs and motorcraft wires.

 

[rb142]

352 is a code for Ignition Coil B malfunction. If you already changed the coil, it is likely a problem in the wiring to the coil. Check the primary side wiring carefully for a short to ground or similar (wire rubbing through the insulation, etc.).

 

[Kendellgil]

I ohm tested all wires from the coils to the pcm and everything was good, Ive checked the coil driver wires with a volt meter on AC hertz mode and all wires show a on/off pattern except R/LB on coil number 2. I ohm tested and continuity tested the wire to the pcm plug and all was good for that wire, I jostled the wiring harness around while the ohm meter was hooked up to the r/lb wire with no change in reading. Seems as if the coil driver for coil 2 in the pcm is bad. Any other thoughts on this before I order a new pcm? Thanks.

 

[Kendellgil]

Disconnected plug wires 3 and 5, (which R/LB is said to control) with zero change in idle quality.