for that method you must go through couple of cycles of adjusting long term low range and high range LTFTs followed by TVUB to get idle in checks.

Then repeat it.

The problem is that TVUB affects idle the most but it also is a natural component of injection time for any load range albeit the longer the injector is open (higher load and maf flow), the less % wise TVUB affects it.

At idle, if the injector has to open for 0.5ms with TVUB of 0.7ms, the tvub is actually larger then required pulse width of injector to reac proper mixture. If TVUB is off by 10%, it will inbalance the mixture by 0.7/0.5 = 1.4, which gives 1.4 * 10% = 14% off the proper mixture.

At higher load when the injector needs to open for 10ms, the total open time wold be 10 + 0.7 = 10.7 which gives 0.7/10 = 0.07, which gives 0.07 * 10% = 0.7% off the proper mixture.

That's why you want to get the KRKTE by riding the car hard and once you have KRTE honed down to within couple of %, you switch you attention to idle and use tony's method. Eventually you will get it right however not the way you think.

You don't add just 0.01ms across the board since adding 0.01 to 0.01 means upping it 100% while adding 0.01 to 1.00 means upping it 1%.

Instead, you need to divide intended bump (0.01 in your case) by the TVUB value at the voltage you normally operate (14v or so) and get what part of the injection time it is in % at that voltage.

For example, you want to add 0.01 to say value 3 from your example.

0.01 / 3 = 0.00333

Now you want to multiply each TVUB value by 1.000333 and you will get TVUB scaled up by 0.000333 across all value EVENLY.

To properly interpolate TVUB you need to have reliable TVUB specs from injector manufacturer. And remember, TVUB values are always given for 3bar of fule pressure. Audis usually run 4bar FPR which means the injector needs to overcome more resistance and its TVUB needs to be multiplied by some value, usually ~16% for 3 to 4 bar bump but it might vary.

I hope I didn't bore you to death.

If idle is off 2 percent don't touch it.

The only way you should be adjusting TVUB is if you don't have the data from the manufacturer of the injectors. Is this the case? Otherwise, input the values you have, and use FKKVS.

The only way you should be adjusting TVUB is if you don't have the data from the manufacturer of the injectors. Is this the case? Otherwise, input the values you have, and use FKKVS.

In any event, 6 percent isn't the end of the world. It's easily explained by the non-linear nature of injectors running low pulsewidths.

This is the exact (and only IMO) time FKKVS should be used for correction.