Fuel injector upgrade and tuning

When you place new injectors into your vehicle it is VERY important to alter the following items:

TUVB -> Correction based on voltage table Min Injection time

Then you use KRKTE to fine tune the flow of fuel

So First: Set min injector time, and injector correction based on voltage. (Usually this is on a datasheet included with injectors if not you can easily google this) Those values are to the nearest volt, and our cars have it in the ecu to 3 decimal places so I corrected the values for the voltage numbers in the 540

For example 0.4@12v would be 0.4/12v* 11.989 = injector correction on 540 Krkte needs to be roughly calculated based on % of increase/decrease of injector time, for example stock injector is 216cc at 3 bar, and green giants is 410cc at 3 bar.

So in this instance: 216/410 is .52... so krkte .52 Krkte-(Krkte0.52) = approx krkte.

After this clear adaptations, drive around highway for 20 mins, LTFT will start averaging out on + or -... go park the car and at idle turn all accessories off. Check the fuel trims, the long term fuel trim needs to be converted to a decimal. And multiplied by your current approximate KRKTE. LTFT * KRKTE = the amount to add or subtract from KRKTE to make it near 0 correction. Since we have the dead times figured out by someone else it makes things ezpz for us. Those are all viable choices. If you don’t do an approximate KRKTE and try starting with only the minimum injector time, and voltage corrections submitted, you WILL flood the engine like I did. Negative LTFT means injectors are injecting too much fuel, positive means ecu wants more fuel. I will be keeping mine at about LTFT -5% so when I’m at wot and the car goes lean the ecu has extra room to correct with more injection time since it only corrects so far.