P2146 miss firing and no power

[Dido]

I was going down the highway took a offramp as soon as i slowed down the cel came on and the truck started to miss fire.. I pulled over checked the codes one was p2146 the other said cylinder 3 intermidiate.. I unplugged my raill pressure gauge, cleared the code, put the truck to stock on the smarty. Started it, it was missing on one cylinder for about 5 seconds then in started on atleast 3 others. I **** the truck off and sat there for about 10 min started the truck back up and its fine?!?!? Any ideas? Injectors are all but 5 months old

 

[phale]

likely a short in the wiring harness, or possibly a bad circuit in the ECM. I have saw both problems cause those symptoms.

 

[07srt6]

I had the exact same problem and code last week. Found one of the pins on my rear injector harness coming out of the plug. Pushed the pin back in and it took care of it.