I'm having problems getting two cars to run correctly.
Scenario 1 - S13 with an RB20DET (T3 turbo and a Z32 AFM).
Loaded up the correct OEM binary and did the MAF scaling using the procedure in the nistune manual. The K value went from around 257odd up to the 420's (off the top of my head).
When i try to 'race' the engine (revving at idle) I get a lot of hesitation and it will not rev past the 3000rpm mark. If I put my foot down slowly it will eventually rev up to the high RPM however there still is a slight amount of hesitation.
I've been playing around with the K value and have got rid of 'most' of the hesitation by rasing the K value to around the 500 mark however if I'm on the dyno and put my foot to Wide Open Throttle (WOT) then it will start hesitating and I know the car is struggling.
The AFR's are at around 14.4 - 14.9 when the K vaule is at 500 (o2 sensor is unplugged). I've tried 2 different Z32 AFM's so I have eliminated that as the problem.
Does anything else need to be changed to run this MAF? It seems as if my tuning abilities has taken a downward spiral after my 5 week holiday.
Scenario 2 - Pintara with a CA18DET (GT28R turbo, 550cc RX7 injectors and a Q45 AFM).
Basically the same problem as mentioned above with the AFM, although the car hardly idles and smoke goes everywhere. I've adjusted the K value and injector latency (done both the scale injector and change maf using the nistune software).
I need another holiday!
