OK, I'm new to this EFI business. You'll have to tell me where these tables I need to set back to stock are. I have a stock tune to compare mine to. So what tables?

Idle>General>Desired Idle speeds

Also:
AC airflow ramp in
AC airflow ramp out

Then: System>AC>TQ loss

What other ones? BTW, if you identify the table by numbers like "B4354" you'll have to tell me how to look them up that way because I don't know how. Otherwise I need directions like the ones I just did above.
Thanks,
Chris

 

Ok Chris I'll see if I can help you with this. I think the problem your having, isn't with your AC settings, it's that your desired air flow isn't high enough and its at the max it can compensate for with the AC off, then when you turn the AC on, it can't compensate, cuz its already at its max.

What you need to do is open the scan tool and in the pids, go to the idle pids and make sure you have Idle airflow correction AC off in gear (RAFIG) and Idle airflow correction AC off P/N (RAFPN) selected.

Then start the truck and start the log. Log for a few minutes in park and in gearl. Click on the data page and find these 2 PIDs. See what there average is in both park and in gear. My guess is they will be 1.5, which is the max they can adjust to.

Then stop logging and open your tun file. Go to Required Airflow, B4307 ( you can do this by putting the table number in the search bar in the navigator and press enter) Increase the values in cells that are 176* and up by a couple of percent. Make sure you do both in gear and p/n. Save and flash the tune.

Start the truck and log again looking at the RAFIG and RAFPN data numbers. If its still at 1.5 repeat the process with the Desired Airflow numbers.

Repeat this process until you get both RAFIG and RAFPN as close to 0 as possible. You may have to ajust one more then the other. If you get negative numbers, back up a little.

Once Desired Airflow is right, I would bet that most of you other stock idle tables will be fine.

This happened to me when I put my cam in and fixing B4307 fixed pretty much all my idle problems.

 

Awesome. I will give that as shot tomorrow. I would do it now but at midnight I dont think the neighbors would appreciate the noise, even at idle its kind of loud.

 

Hmmm, I'm getting the "PID.CALC.RAFIG is not a valid PID" box for both RAFIG & RAFPN. Any suggestions? Do I have to be hooked to the truck first?

 

Right click on them and click on "more info" I think there is another pid that has to be selected for these pids to work, since they are calculated.

 

Well, That was a colossal pain in the A$$ but I got it saved as a PID file. I will log tomorrow. Thanks for the help!

How to do it for the new guy:
Open Scan tool
Click on F8
Click on "Caption"
Slect these PIDS:

IAC_LTD_DMA
IAC_LTPN_DMA
IAC_STD_DMA
IAC_STPN_DMA
RAFIG
RAFPN

Just thought I'd throw that up to make it easier for the next guy trying to do it

 

Just noticed B4307 doesn't go past 140* ECT. The range is from -40 to 140

 

That cuz your in C (metric), switch it to F (imperial)

 

got it. Will log tomorrow