My question is how do you set up the maf setting in the program for this set up. I made a tune for what I thought was correct but when you lay into the gas the thing feels like a dog now. Like I took 40 hp away at 4000rpm-5500rpm.
The only real way to dial in an aftermarket MAF is to hook Wide Band O2 up to the car and datalog AF ratio at the various load points, then by adjusting the MAF transfer function in the particular load points to deliver the desired AF ratio you seek.
You will need access to both the "base fuel table" and the MAF transfer function to make this happen properly.
With that said.. I hope you bought the "high end" sniper software and not the "entry level version".
Also, you want to datalog the MAF voltage.
When I had the C&L meter on my car, the Maf voltage was "cut in half".
At WOT the voltage is "supposed to be" in the 4-4.9 volt range, and with the C&L meter my maf voltage would peak just above 2 volts {that is bad)
What is happening is the C&L is "lying to the PCM" and thus "leaning out" the super fat AF ratio that comes stock on the mark 8.
When you go adjust the commanded AF ratio to be less than 10/1 (stock AF ratio) then you run into problems with the aftermarket meter and it's erroneous data it's providing to the PCM.
If I were you, I would concentrate on dialing in the "stock maf" rather than the C&L.. I would sell the C&L and use the money to offset the cost of the Wide Band 02 install.
The stock maf is very well matched to a NA mark 8...and it's a dependable maf that doesnt "lie to the PCM".
when you put a larger maf on the car.. you are losing or decreasing the "resolution" of the MAF because the car wont pull enough air thru the maf to reach 4-4.9 volts.
hope some of this helps.. in some manner or another
