Car is dumping fuel at idle afr is at 10:1 but only at idle. Even in the grass a little and every thing is right where it should be. Already replaced maf and both map sensors. High pressure pump is reading right what ecu is commanding. I’m going to replace the a/f sensor this week but if that doesn’t do it I’m not sure what to even check or replace after that. Any help would be awesome

 

What are you using to read AFR? Also LNF, LSJ, 2.2, or 2.4?

Never mind you said the HPFP is reading fine so it's LNF. Any new mods? Intake, anything?

 

Using hp tuners to read everything no mods other then gutted converter and upgraded map sensors that have been tuned for

 

Is it that rich out the exhaust? Should smell fuel at idle.

 

It’s reading -30 short term fuel trim at idle when I’m on the gas fuel trims are right where they should be.

 

Is the cat light-off turned off? Use HPTuners to graph your front O2 sensor, does it oscillate properly when not idling? I'm guessing it does, since you're cruising AFR is spot-on.

EDIT: Actually, LNF's have widebands don't they... so I guess it won't oscillate.

EDIT2: might try reading through here: https://forum.hptuners.com/showthrea...-Warmup-Delete