Rawze.com: Rawze's ISX Technical Discussion and more

So the other day I was checking my truck with insite and saw my turbo is at 21 key on engine not running. Key on engine running it goes to 18 what would make it do that. The truck is mandate free

I don't know your turbo map, but my guess is 18 is your min at idle and 21 is your max. With the engine not running, 21 was probably where it was at shutdown, and as soon ask you start the engine, the calculations made by the. ECM results in 18 so that's what the ECM commands.

(02-10-2017 )Hammerhead Wrote: [ -> ]I don't know your turbo map, but my guess is 18 is your min at idle and 21 is your max. With the engine not running, 21 was probably where it was at shutdown, and as soon ask you start the engine, the calculations made by the. E loCM results in 18 so that's what the ECM commands.

The thing is that it was set at 5 at idle and it moved by it's self to those positions by it self

Might have variable llim and ulim mode set to 0 instead of 1 in the cal

Mass charge flow says otherwise unless you clip it with ulim.

So is this a good thing or do I have to get in contact with the person that did the tune to get it fix.

i dont remember if i left it at 5 or brought it up to 18 to get some positive pressure in the idle region. you say it always used to be at 5 and is now suddenly at 18? call me.

At least it is not 80% at idle like from factory and sucking excess fuel because of it.

(02-10-2017 )Rawze Wrote: [ -> ]At least it is not 80% at idle like from factory and sucking excess fuel because of it.

Yeah I know but just finished talking to Unilever's and he did set it to 18 on the last tune. I just didn't realize it until Saturday when I was going over everything on my truck. And because I have a 122,000 miles check engine light free. So everything is good.