Cruz Lo

5.3L 228 cam No other mods other than a K&N filter/intake tube

I tuned my VE with the maf turned off. Copied the high octane spark table to the low octane table. I got all the cells that I hit on within +- 2 and even repeated this two other days to be sure everything was within +-5.

So when I turned on my Maf (set fail frequency back to stock) now my long term fuel trims are +15 to +17%?

What's up with this?

Do I need to calibrate the MAF or something?

Thanks.

2002_Z28_Six_Speed

iTrader: (19)

Yes, you do.

Ryne @ CMS

iTrader: (10)

you tuned the ve table now, now you need to tune the maf table, in all honesty its pretty damn easy

Cruz Lo

well thank you.

I will work to find out how that is done.

2002_Z28_Six_Speed

iTrader: (19)

Log Error of the VE. The Hz of the MAF. The Commanded AFR.

Cruz Lo

Thanks;

What PID is the error of the VE? I can't find this in HP tuners.

I guess I just alter the airflow to frequency table til the fuel trims come back in. Right.

Thanks.