Originally Posted by cliffyk

Unfortunately it's a somewhat confused guess, the injector pulse width has everthing to do with how much fuel is sprayed...

The PCM calulates a precisiely timed pulse each time the injector is commanded to inject fuel. The length of the pulse is based upon a whole things, however air flow as measured by the MAF, IAT, ECT, throttle position and what it knows about the injector capacity (from the low and high injector slope settings in the tune).

In closed loop operation the PCM also considers feedback from the front O2 sensors when calculating the injector pulse width.

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OP, if you were to datalog your car you would like find that the fuel trims on each bank will be very different. The adaptive learning system can handle up to +/- 25% added or reduced fueling which makes it able to handle the 19lb/H and 24lb/H mix (barely).

But, it is not good. Do you know what the tune is set for (19 or 24)?

Are you sure they are yellow and not orange?

Originally Posted by JC316

The tune is the stock GT, so it's for a 19lbs injector. They could be orange, I am color blind and I have issues between yellow, orange, and red. So basically, I need to grab some 19lbs injectors or get 24lbs injectors and a tune?