misfire

[jetmech]

I put the stock coils back in, installed new plug wires and swapped in new spark plugs. I'm still getting an intermittent misfire....it feels like a misfire anyways and I keep getting a misfire code. Plus wideband will read rich when it happens. It's wierd cuz it only happens when the engine warms up and the engine has died several times sitting in traffic. I'm about to throw a grenade under the hood and walk away. What could possibly be wrong with my POS??

[farmtruc]

With hptuners, add the misfire data and see which cylinder is misfiring.
Ignore the small counts on the neighbor cylinder, probably just picking up junk from the actual cylinder misfiring.

Next, swap coil, plug, wires, one at a time, see if it follows.

Next, compression test on that cylinder and others to compare.

Could be an injector issue as well.

[jetmech]

Could be an injector issue as well.

But could it still be an injector if the wideband reads rich when the engine starts to run funny?