-1 KR and 39deg of spark advance idle WOT?

[WickedAvalanche]

Help Please!!
Have my tune hanging in the rpms at WOT. 1 KR during WOT and after throttle cut, advance 39deg. Anyone know what parameter might be causing this? Any info is helpful, cheers!

[ZincGT]

Post your tune

[WickedAvalanche]

Post your tune

Ive need to adjust my tune where i turn the key I am not needing to play with the pedal. Idk if i am getting too much air at crank speed or to much spark. I got it to the point where the engine idles with minimal adjustment by ecu. Now I am checking WOT values and It is a bit advance to where the idle hangs in the rpms

[kevin87turbot]

It's actually not going to 39 degrees at WOT. Examining the datalog, it does spike up to 39 degrees timing, but that's only at 28% TPS. WOT will be around 84% TPS on your vehicle.

You need to zero out the base correction spark table, so that it doesn't add any timing during WOT.
You will still probably have to pull a couple degrees timing out of the high octane and low octane tables at high rpm. Typically, in heavy vehicles like yours, you'll only get around 24-25 degrees max timing at peak torque and around 26-27 degrees at high rpm, assuming you're running 93 octane.

[mbray01]

idle airflow, idle timing, idle spark overspeed. 3 main culprits for idle hang

[WickedAvalanche]

It's actually not going to 39 degrees at WOT. Examining the datalog, it does spike up to 39 degrees timing, but that's only at 28% TPS. WOT will be around 84% TPS on your vehicle.

You need to zero out the base correction spark table, so that it doesn't add any timing during WOT.
You will still probably have to pull a couple degrees timing out of the high octane and low octane tables at high rpm. Typically, in heavy vehicles like yours, you'll only get around 24-25 degrees max timing at peak torque and around 26-27 degrees at high rpm, assuming you're running 93 octane.

So zero out the whole base correction table in the :Flex fuel and :Gas tabs? or the setting itself zeroed out everything?


Entire tables or only where WOT would overlay?

[WickedAvalanche]

Here is my correction from the last tune and the log. I trimmed the spark at high rpm in my High octane, adjusted base spark so it wasn't pulling timing at cranking speed. It also doesn't hang in high rpms, sounds nice But idles a little higher than before. Almost starts on its own after about 3 seconds, I might boost up the spark a bit more to get a smoother start. I guess this was in the right direction. Thanks