Quoting number638:
Yup. You've got an AFC in your car, there's your problem!
Seriously RPM x Throttle is the worst way to "tune" a turbo car. Your not accounting for actual airflow, you are tuning by how hard you step on the pedal.
And that doesn't always co-inside with how much airflow your turbo is making at X Throttle position. /ubbthreads/images/graemlins/uhh.gif
It's good for N/A cars that never see more than 0psi, though.
Have you used a logging program to verify your RPM the ECU is seeing?
If your car is chipped, why bother with the AFC at all?
Uh what? your not modifying the tps signal. Your modifying the airflow signal by a linear percentage across the whole fuel map. Afc's are a great BASIC tuning device. Don't knock what works. They function the exact same as the fuel adjust in DSMLINK. So does that make DSMLINK bad too?
Wendy: there are two possible rpm wires on the ecu.
ECULINK
Check this, Either pin 109 or PIN 21 Will supply a tach signal. Only one will WORK for a Tach Signal though. I learned this the hard way. Check this out and check your base settings. On the right pin (i think it's 109) you should select 4cyl. Yea it's wasted spark but this is a TACH output wire so it already adjusted for a correct reading.