TunerPro User Forum

Hello
Need help here
I ran my engine with 250 cm injectors before and it was not enough after 4K RPM and 0,9 boost
Injector constant was 54909
I have changed to 440 cm green BOSCH injectors and cannot start the engine
I have tried different constants from 54800 to 53000 but it doesn’t start
I can hear combustion goes on sometimes but not enough
Can you please help me with what INJECTORS CONSTANT I should set
I ran Cobra RTP emulator = motronic online and MAF emulator = MAP sensor (MAF deleted)
DME Bosch 402
Tuner Pro

Found out the correct injector constant without “GURU” help here

Another problem, when engine is hot, I have to run starter for 7-8 seconds in order to start the engine

Cold start is OK

Where to look?

Hey, I dont know much but this guy does.
https://www.youtube.com/watch?v=InZPdmn ... iC&index=3
Also check out his m50turbo build, he explains a lot tuning in some of the videos, just use the playlist function on his channel and you'll find it there.
Hope it helps even a little.