03 Silverado 6.0 turbo tune help

[03silverado]

Vehicle is a 2003 Silverado 1500 6.0 4l80e with s366 and Tick Performance turbo stage 1 camshaft. I'm having some detonation issues under WOT in boost. I'm running 91 octane fuel and about 12 psi of boost. If I do a WOT pull from a dead stop sometimes it pulls up to 7 degrees of timing but sometimes there is no KR at all. Going WOT from about a 40 roll its the same thing. Some pulls have no KR and some pull a bunch of timing and I'm not sure why. I'll post a couple log files and my tune if anyone would be willing to take a look and give me some advice it would be much appreciated! I'm running this tank out and switching to 93 with 10% ethanol, I do not want to go e85 because I want to be able to drive it anywhere and not worry about fuel.

KR is only towards the end of the log files

Thanks.

[5FDP]

Set the MAF DTC's to fail on first error and not NO MIL LIGHT.

Which MAP sensor are you using? The offset setting on most 2 bar maps is 10.33 and not 8.01, like if you were using a cobalt map sensor.


In the scanner you aren't logging the right MAP channel it seems, it maxed out at 105kpa and that can screw up your logging/tuning. You also want to remove all your MAF channels because you are no longer using the MAF sensor.

[03silverado]

It is the cobalt map sensor. In the scanner I do have the 2 bar selected as the pid for the map. Unless you are talking about something in the histogram?

[ANGRYZ06]

What year Cobalt sensor is used for this application? I am running a 6.0L with S366 also. Not tuned yet. Only looking at running 6 psi.

[NRunkle]

What year Cobalt sensor is used for this application? I am running a 6.0L with S366 also. Not tuned yet. Only looking at running 6 psi.

Had a fun time trying to finding the right sensor... Go to the parts store and ask for a baro sensor for a 2005 cobalt with the 2.0 supercharger engine

[ANGRYZ06]

I got lucky then. Thats what I bought. OEM ACDelco 213-796, GM 12614973 MAP Manifold Absolute Pressure Sensor