vipergtrdj

It's a 00 Silverado 1500, lq4, 4l80e, ebay gt45, 80lb injectors. I've checked and cleaned grounds, replaced a couple grounds, new coils, new wires, new plugs. Checked the plugs to make sure pins were tight. Still get p0352 error. Truck runs fine though, no misfire counts in hptuners. I will clear the code and within 10seconds it shows back up. No check engine light, just a pending code when I pull them. What am I missing ?

2xLS1

iTrader: (25)

If there is enough wire length to swap #2 with #4 on the coil end you could do that and then swap red 29 with red 67 in the PCM connector. If the fault stays on #2 coil then the driver in the PCM is probably bad. And with those mods I would guess it is tuned in SD. Misfire detection is disabled on some PMCs/OS in SD.

vipergtrdj

Correct. Its 2bar OS SD tuned. I'll have to check about wire length and swap them. How often do the drivers in the pcm go bad? From what I found this code is something wrong with wiring, or coil pack.

The truck drives fine otherwise, no hesitation, no rich conditions. Doesnt act like its misfiring, no skips or anything. I had an issue with plugs being gapped to far and boost blowing spark out, so I gapped then to .030. Cleaned up plugs and then this code appeared. Figured it was wiring but checked everything over.

2xLS1

iTrader: (25)

You could say a coil driver going bad is rare until it happens to you. Per Mitchell: DTC will set if PCM detects ignition control circuit is open, grounded, or shorted to voltage within one second.

vipergtrdj

ahh ok. Well I checked everything and did some rewiring. still had it on #2. So I pulled the main plug for the coils and replaced the plug with one off parts truck (that was running with no DTC). Started truck and went for a 10mile drive (testing out new tune and stuff too). No DTC for the whole drive. So I am saying bad plug. I haven't put my plug on the parts truck yet, but if I do I bet the code comes on.