Does anyone know what it means when you change injectors and have to recalibrate the mass air flow sensor, how do you recalibrate it. any help would be appreciated

 

I think if you don't upgrade to a new MAF, you can just disconnect your battery for a few minutes to reset your computer, then hook it back up... start your truck a few times, and that should do it. This usually works for me when I do any intake mods.

-Flea

 

When you put larger injectors in, the PCM does not know it unless you reprogram it. Thus it will think you have stock injectors and they will cycle based on that. This leads to too rich condition. Like changing 24lb/hr ones in for 19lb/hr.
One cheat is to recalibrate the output of the MAF so that the PCM thinks its getting less air and thus puts out less fuel pulse to the injectors.
This can cause drivability issues. Load, which the PCM calculates and drives spark timing and all kinds of other stuff will be miscalculated due to the MAF being off.
Best way around all of it is to get a chip burned with the injector size in it.
birdman

 

There are 3 ways to do it:

1. recalibrate the ECM to compensate
2. recalibrate the element, the best and most accurate way by like ProFlow technologies
3. change the size of the sampling tube in the meter, like the C&L units.

Clearing the battery does not do squat on calibrations with the MAF