HP Tuners Tutorials - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Gregski** · 03-08-2020, 03:34 PM

Idle Tuning - Short Term Idle Trims & Long Term Idle Trims working together.

Lets take a look at another example. Here we have shifted into gear and we should be getting 44 pounds per hour airflow per the Idle Base Gear Airflow channel. However our Idle Desired Airflow in order to keep the proper RPMs is only asking for 42.

So we look at the LTIT Gear/ACoff channel and it is only making a 1 pound per hour adjustment, hey that's not enough?! But wait, look at it's little helper the Idle Adapt (STIT) channel it is also making a 1 pound adjustment, for a total of 2 pounds. Remember the Short and Long Fuel Trims work together.

03-08-2020, 03:34 PM	#11
Gregski Post Whore Join Date: Aug 2014 Location: Sacramento, CA Posts: 10,811	Re: HP Tuners Tutorials - Idle Tuning Idle Tuning - Short Term Idle Trims & Long Term Idle Trims working together. Lets take a look at another example. Here we have shifted into gear and we should be getting 44 pounds per hour airflow per the Idle Base Gear Airflow channel. However our Idle Desired Airflow in order to keep the proper RPMs is only asking for 42. So we look at the LTIT Gear/ACoff channel and it is only making a 1 pound per hour adjustment, hey that's not enough?! But wait, look at it's little helper the Idle Adapt (STIT) channel it is also making a 1 pound adjustment, for a total of 2 pounds. Remember the Short and Long Fuel Trims work together. Attached Images



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