What other mods do you have?

11* is very low. If you are using autotap, did you use the exel spreadsheet that is available online to log your results?
Sometimes it's hard to see the true timing unless you log it and get it in some sort of legible format.

Do a few more runs with loggin on and post back and we'll see what you got.

Pulling the maf will lean your condition out a lot, which may cause detonation, that may be a reason the engine is only running on 11-13*'s of timing.

I'll go home tonight (duh) and check out my neighbors truck , he has a 02 HD 6.0L too, i'll log it and compare it to yours.
Enable logging for this stuff: ltrims, a/f, fuel cell, timing advance, KR, maf, temp, rpm, speed, air intake temp, throttle position, 02's (sensor 1 on bank one and two).

I've been wanting to tune his anyway, he bought one of my vins on my single cable a while back and he's just been lazy about getting back to me.

Man, i wish i had a dyno so i could see some results, 1/4 times are nice and so is SOTP, but dyno is on paper. Very soon, i can't wait.


so do that, and we'll talk more about it.

good luck,


allen