i hooked up my dyno tune wideband lastnight and went for a ride. at WOT its at 9.8:1 is that right stock tune and injectors. racetronix pump and longtubes whats the deal.
anyhelp would be great thanks guys

 

I'm guessing with your new pump, you're pulling much more fuel pressures, and its causing too much fuel to be dumped, you're going to need to adjust your tune.

Best Regards,
Adrian

 

great thats awesome. oh well HP here i come

 

YOu need a tune, the longtubes will make it run rich like that !

 

That's way too far out of range. I'd double check the accuracy of your wideband.

 

It's not that far out of line for, say, a car with the stock
commanded 11.7:1 AFR and some jacked fuel trims from
headers. +15 LTFTs would about do it. Looking at the
idle AFR on said wideband would be instructive though.

 

at idle it jumps from 19.9 to 9.8 once in a wile it hits 12 or 15:1 never steady 14.7 just jumps back and forth
i just installed it last night and programed like instructions said.

 

It should "flicker" because the engine bounces fuel
around in closed loop. If you turned up the smoothing
it ought to resemble 14.7 (if this is something you can
do in the handler interface program). But at least it's
bouncing on both sides of the right answer, so it's
alive and not completely ridiculous.

What does the scanner show you for WOT fuel trims
whilst getting this low AFR?

 

im gonna check my LTFT tomorrow