Ever since i went to a colder plug, TR6, my truck will stumble when it is cold. Should I go back to the stock heat range? I'm running about 8 psi of boost.

 

You might need to have some tuning on your idle done. My truck usually stumbles in 90* weather but it died on me a couple of times today (60* outside) because I'm still running a baseline tune. I'm sure that my truck will idle a lot better in any temperature when Justin starts tweaking on the tune.

 

Does it stumble all over the rpm range or if you get on it?

 

You probably need some fine tuning, however, if it wasn't doing it with the stock plugs, there'd be no reason you can't run them, just gap them appropriately.

 

Yeah just when i first get on it it stumbles then it is fine though out the rpms. But maybe I'll put stock plugs back in. Just wasn't sure if it was alright to keep them in.

 

mine does the same thing.

 

sounds contagious

 

lol....

 

what gap do you recommend? I believe I gapped mine at .035

 

5-8psi, .030-.035" should be ok.