I tried adjusting this and have a few questions. From a dead cold start, I monitored my STIT and LTIT. My LTIT after I adjusted the RAF table is now about 0 from cold start to normal operating temps, but from 32* my STIT is 3.0 and gradually goes down to 0 at op. temp. Is this correct?? What do you do with the IAC Park Postion Table?

Here is what my RAF table looks like now.

IAC Park Postion Table

Here is my log.

HPT Log

 

The STIT + LTIT is the total error on the idle airflow (ie. the amount the PCM is correcting the idle airflow numbers to maintain the desired Idle RPM).

In this case i would say your engine is warming up faster than the LTITs will adjust so you need to take into account both your STIT and LTIT.

In anycase, looks like your idle is well tuned

Chris...

 

When I open your file in the scanner it doesn't show STIT or LTIT in the chart display but when I export it to excel I see everything you logged.

The chart is only showing the defaults it seems.

 

On the scanner itself, go to the left of it and right click. There you will be able to change the settings to show what PIDS have been selected.

 

Ok, I just installed my new cam and I am trying to tune my idle. I understand that the STIT and LTIT are combined as my idle error. But what LTIT do I use P/N or GEAR? If i log (STIT, LTIT(p/n), LTIT (gear), and dynamic airflow), why do I log all these if I only use the dynamic airflow value in this calibration table?

I am looking at this spreadsheet and trying to figure out what it does. I stick in my dynamic airflow values from where? My CSV sheet gives me many dynamic airflow values(which ones do I use?).

Also, once I stick in these values. What is the RAF table used for? I understand that it calculates new airflow values but what is the RAF table used for?

Basically, how do I tune idle using my LTIT's(gear and P/N) and STIT'S?

 

Your low temp values look really really high to me.