2004 6.0 NV4500 Tahoe

[Dantheman1540]

Well I thought I had the AC off idle figured but today its running like shit again, wanting to die at stop lights and surging like crazy. Its strange that it runs like crap for about 30 seconds and then suddenly cleans its self up and idles great although its crazy lean like 17afr. You can see here how when it came to a stop it started jumping up and down then slowly figured its shit out and idled great for 15minutes while I was at the post office. Then I started driving and my next stop it reverted back to running like garbage and I had to give it gas to keep it from stalling. Is there some weird return to idle condition that would do this? I think I'll reset the OS/US spark settings back to stock now that I have the correct BIA.

 

[pwtr02ss]

Its happy now with the AC off, with the AC on it struggles and surges at idle still. I added 10% to the Torque model>loss>vs AC pressure table, should I adjust the Idle> proportional tables?

Take a look at my camaro file I sent. Mine doesn't like the ac on either lol

 

[randeez]

Its happy now with the AC off, with the AC on it struggles and surges at idle still. I added 10% to the Torque model>loss>vs AC pressure table, should I adjust the Idle> proportional tables?

i dunno dude. havent ever really understood the proportional and integral tables, they never seem to do what i want them to when i make changes

that seems like a lot of spark also
how are you trying to set idle or find a good idle? zero out all the adder tables, lock the entire spark table to one value ?
since you are always "in gear" the idle spark table probably does nothing

 

[Dantheman1540]

Take a look at my camaro file I sent. Mine doesn't like the ac on either lol

So I want to look at that tune and do everything opposite?

i dunno dude. havent ever really understood the proportional and integral tables, they never seem to do what i want them to when i make changes

that seems like a lot of spark also
how are you trying to set idle or find a good idle? zero out all the adder tables, lock the entire spark table to one value ?
since you are always "in gear" the idle spark table probably does nothing

I basically raised the idle to 800ACoff 850ACon thinking that should be plenty of RPM as I had it idling fine with the previous setup at 650-700. Then I just used the same idle spark of 28* in the idle cells and smoothed out around it.

For BIA I turn off all acesories and let it idle warmup from as cold as I can get it and just match the Idle desired airflow to the ECT for as many cells as I can then smooth around them.

I have never tried to zero all adder tables although I did see that in one post on the HPT forum. I also saw something about changing spark during idle to find where it makes the most vacuum but IDK how to change spark while its running.

I figured the in park tables probably did nothing but what's weird is none of the weird issues start until the truck hits zero MPH for more than one second. If its rolling at 1mph it won't do that.

 

[pwtr02ss]

So I want to look at that tune and do everything opposite?

I basically raised the idle to 800ACoff 850ACon thinking that should be plenty of RPM as I had it idling fine with the previous setup at 650-700. Then I just used the same idle spark of 28* in the idle cells and smoothed out around it.

For BIA I turn off all acesories and let it idle warmup from as cold as I can get it and just match the Idle desired airflow to the ECT for as many cells as I can then smooth around them.

I have never tried to zero all adder tables although I did see that in one post on the HPT forum. I also saw something about changing spark during idle to find where it makes the most vacuum but IDK how to change spark while its running.

I figured the in park tables probably did nothing but what's weird is none of the weird issues start until the truck hits zero MPH for more than one second. If its rolling at 1mph it won't do that.

I was hoping you'd fix it and send it back when you figure out yours

 

[pwtr02ss]

So I want to look at that tune and do everything opposite?

I basically raised the idle to 800ACoff 850ACon thinking that should be plenty of RPM as I had it idling fine with the previous setup at 650-700. Then I just used the same idle spark of 28* in the idle cells and smoothed out around it.

For BIA I turn off all acesories and let it idle warmup from as cold as I can get it and just match the Idle desired airflow to the ECT for as many cells as I can then smooth around them.

I have never tried to zero all adder tables although I did see that in one post on the HPT forum. I also saw something about changing spark during idle to find where it makes the most vacuum but IDK how to change spark while its running.

I figured the in park tables probably did nothing but what's weird is none of the weird issues start until the truck hits zero MPH for more than one second. If its rolling at 1mph it won't do that.

The only thing I can answer from this one thing is you can add spark from the special functions in the scanner, while its running. Unless I misunderstanding that little bit of the overall question.

 

[randeez]

Correct, but you take spark away, not add in the scanner

 

[pwtr02ss]

So the "up" arrow doesn't actually add anything? I messed around with that a little but only went up. I couldn't tell it was doing anything. Maybe that's why lol

 

[randeez]

The number goes up...but that's how much spark it takes away lol.

It's also a little clunky, as it I'll hit it once and if I leave Pointer hovering there it'll jump to like 5 real quick for some reason use at your own risk lol

 

[Dantheman1540]

So the "up" arrow doesn't actually add anything? I messed around with that a little but only went up. I couldn't tell it was doing anything. Maybe that's why lol

The number goes up...but that's how much spark it takes away lol.

It's also a little clunky, as it I'll hit it once and if I leave Pointer hovering there it'll jump to like 5 real quick for some reason use at your own risk lol

Oh boy another inconsistent thing to mess with lol. I just tried adding .5 to the BIA and now it just hangs everywhere. Gonna try pulling .25 out and see if that does anything.