Thanks for the quick response. I'm going to put less final tune back in until you have a new one to try. Truck ran great with the final one I just wanted DOD back on to try and get my MPG up.

If I put it back stock, or install the Diablo tune, DOD work's fine but my check engine light is on because of the missing cats. I nstall the custom tune & it stops working, what else could it be?

I wish I could report back that DOD works now but it does not.
Attached are copies of the last tunes and the backups.

Please look @ this and let me know what the solution is.

Here they are, sorry it took so long....

The vehicle is a 2008 Silverado K1500 LTZ 5.3 with LT headers, no cats, smooth intake elbow & high flow filter. After running the log files and getting it dialed in I wanted to turn DOD back on. After the header install, with the Diablo tune DOD worked fine. Nothing was changed in the "final" tune ...

gsvar2004 wrote:im trying my damnedest to find all info i can. post up you misfire counts when you get it logged please

I only got 2 on cylinder 6 from the 15 minute log I ran yesterday. I will run a few more when time permits to see if it is consistently that cylinder.

Ran a log file on my 08 K1500, connected the intune to the laptop (it's fully up to date). I tried to use the download icon from the data viewer menu and received the pop up "an invalid argument was encountered". I then saved the file to my hard drive and tried to open it but it is not recognized ...

I finished installing all available updates & it still gives me the message OBD II functions not supported, when will this be available?

I'm watching this as I just got my intune out that I used to tune my Charger to try & diagnose the rough idle on my 2008 K1500. It will idle smooth then the tach will drop & it will get rough then it clears back up (all @ idle). Please post up anything you find or any suggestions. The truck has less ...

Of course the day after I say it does not come on with me it comes on

I would never beat on a cold engine. I have not had a problem when I'm driving it. Every time my wife drives it to work it comes on right before she gets home. This is usually late @ night when temps are cool.

Yes I have a CAI on it. The intune may be the next best thing but if I had it to do over I would have bought another predator.

I used a 180 NAPA stat and still get the codes on cold mornings.

This has happened 3 x's. Once after writing the 91CAI tune, once when modifying this tune and tonight when I changed to the CAI tune which I am assuming is the 93 octane tune as stated in another post. I asked but never got an answer. It took me 4 flashes to get the car back to where it would shift ...