Cant figure out Fuel trims

Can someone point me in the correct direction. My engine shows thru a DTC code that Bank 1 is at +25 and is running too lean however plugs show rich. Also, Bank 2 is intermittent to running +25. Have checked all leaks and cant seem to find any other than the ones I have found being a cracked pcv hose connector which I fixed..


6.0L 370 c.i / 4l80e 2800-3200 Stall
Longtubes full dual exhaust
Flat top pistons
243 stock heads
Tsp 228r cam 112 LSA
Deautshwerks 44lb injectors
Truck intake, factory TB, cold air intake.

Do you have a wideband o2 sensor?

If not you need one to verify this stuff and one is required anyway for tuning something like this.

What's your fuel pressure at?

The computer is adding in fuel to make it run okay so I don't think I'd be trusting the plugs when the trims are adding in all this extra fuel to make it run better.

If fuel pressure is good and not moving around you could simply add 10% to the MAF and VE table to see if the trims come down.

Okay thanks for the reply. Will try. I do have a wideband just need to get it installed. Fuel pressure is good and holding steady.

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Originally Posted by JamieHicks18

Okay thanks for the reply. Will try. I do have a wideband just need to get it installed. Fuel pressure is good and holding steady.

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Interested to know if this got you going in the right direction. I have these same injectors and after entering the injector data from deatchwerks my went crazy lean as well.

Out of curiosity, did you ever get your lean problem figured out?