COBB Stage 1+ Stratified tune running lean
Stage 1+ on 2013 mk6 GTI.
Installed GFB DV+ to get rid of whistling.
Running Stratified OTS 93 octane map. I have not gotten the second (MAF calibration) map yet, Stratified wants me to solve the following issues first.
Revs hang for 1 second before dropping down during shifting.
Below 3000 rpm it almost like driving an automatic -revs not dropping off during shifting.
MPG down to 29.4.
AFR and fuel trims show that engine is running lean.
Codes:
P0101 Mass of volumetric Air flow Circ. Range/Performance. Defined as a Mass Air Flow Sensor Circuit/Performance Malfunction
P2177 System too lean off idle, Bank 1
P2279 Intake Air System Leak
My mechanic did a smoke test, didn’t find anything.
Stratified says to do a pressure test. How do you even ask my mechanic to do one of those?
Maybe it's a bad MAF sensor? But it was fine the day before I put the cold air intake in.
I feel like I should, gulp, take it to a dealer and have them diagnose and fix.
It's been two months with a poorly running car, I'm getting frustrated with the back and forth with multiple vendors, visits to my mechanic, and still not sorted out.
Enjoy Stage 1+ they said, it just bolts on and it's awesome, they said. Sigh. I know what I was getting into but this sucks. /End Rant.