Multiple Cylinders Misfiring.

[Tbay LX]

Hey guys, just when I was thinking that my 350,000KM engine was infallible, my truck started shaking like a wet dog, and the check engine light started flashing. I ran the codes and this is what I'm getting:
P0306 Freeze Frame
P0300
P0303
P0304
P0306 Pending
C0200 ABS
Does cylinder 6 coming up twice like that indicate it is where the problem lies? Or does this indicate there really is a problem with multiple cylinders? I was assuming I was going to test, see a misfire on one cylinder, and replace that coil and plug. I guess life is never that easy.... From what I understand, the flashing CE light means there is the risk of damage to the cat, and I probably shouldn't drive it at all, eh? I'm not too worried about the faulty speed sensor right now. But I guess it should probably get fixed too. Just glad this happened before I made it to the trail head!

 

[Glacierskier]

P0300 is multiple cylinders misfiring... cylinder 3, 4 and 6 according to your codes.

 

[Tbay LX]

Any thoughts on a likely cause of multiple cylinders misfiring? Something to check first? Or is this the sort of problem best left to the pros?

 

[Glacierskier]

I would check those coil packs... and go from there. Search for misfiring here on Mud. Lots of good info

 

[Tbay LX]

Thanks man, looks like you were right. I had a feeling it was #6, because it popped up multiple times on the code scanner. One of the other threads on Mud mentioned that a bad coil could set off misfire codes in adjacent cylinders, so I pulled 6, swapped it with one (which hadn't had a misfire) and sure enough, #1 now showed a misfire. Anyway, just replaced that coil, and all my plugs, and things seem to be running fine. Hopefully it wasn't something upstream that caused the whole problem in the first place. I guess I'll find out.