06-09-2015, 08:17 PM
Join Date: Dec 2004
Location: Brisbane, Australia
Total Cats: 32
I understand how daunting it can be...
Before you start tuning you want to make sure your thermistors are correctly calibrated, air density correction is set correctly and injector data is right, otherwise you're just chasing your tail. Make sure your wideband is behaving itself 100%.
With cranking fuel, if the car doesn't start, 95% of the time it's not enough fuel. It will smell rich because of the unburnt fuel but don't let this confuse you.
Once you get the car to start you may need to use a bit of throttle to stop it from stalling until you set the idle valve correctly and ensure the idle mixtures are close.
Set the idle cells in the VE table to whatever mixture gives you the most vac. Make sure the table is smooth or the interpolated values are going to be weird. Turn on headlights, A/C or whatever you can to move into other load cells.
From here on just set up a sensible lambda target table and work from rich down to your target.
Timing is harder - make sure you have det cans on when tuning, especially if you are adding timing. This is so much easier to do with a load dyno where torque can be sensed.
You can read about this stuff all day but for me I didn't really sink in until I got stuck in and just did it.