Misfire for 45 seconds then fine.....plugs?

[BombNastyGST]

I bought a set of Iridiums and installed them 3 weeks ago, and the car has never run better, until tonite. I go to give it gas in 3rd and it just starts misfiring....so i put it in neutral and coast, then try it again, still doing it. Pull out the pocketlogger and it says "cylinder 3 misfire detected". Car starts running fine, i pull over, clear the code, drive home. Check the wire, fine, connected on both ends. Now i run 15 psi on the street with 93 octane. Should i be running a step colder plug? Is that what caused my misfiring?

 

[doodie]

I had a cylinder 3 misfire but that was from my Injectors. You should try to go back to copper plugs. You don't really need colder plugs yet. Wait till you run high boost.

 

[SpeedFreak03]

Well I'd recommend trying BRP6ES plugs first and see if that fixes the problem, that would be my guess. I don't think you need a step colder yet, with stock boost.

 

[eclpsegsx12]

Whats with that cylinder 3 misfire code BS???? I have it too and i run 780cc injectors