My truck is throwing p0300 random missfire code. It has been missing since I have put the stroker in. It only misses between 2500 and 3000 rpms. What do you guys think. It runs strong but if I get on it from a dead stop it stumbles and then takes off like a bat out of hell. The plugs look alright and I have new plug wires. I have a new fuel filter and ran seafoam through the fuel system.

 

What size stall converter are you running? You may need to up the misfire count, I had the same problem when I was running a TCI 3K stall, upped the misfire count and all was good.

 

I will look this up in my factory maintenance manual when I get a little more time. However, I'm sure that GM recommends a crank relearn anytime the crank or the crank reluctor or the inductive pickup is changed. What have you done in the way of data logging and tuning since the engine change?

Steve

 

I would try the crank relearn, its easy to do.

 

+1 for a Crank relearn. Its quick and simple.

 

Yeah unfortunately I don't have hptuners or efilive and I am running a 3200 stall.

 

Who does the tuning on it?

 

If you find a buddy with EFI live (or HP tuners I think) they can do the crank re-learn without licensing the truck.

 

Yep. Tyler or Danny should be able to do it. I could also do it, but I think they are closer.

 

Ya the Crank relearn is done with the scanner so no licensing needed.