ECUflash scaling injectors???

[talon913]

ok so im having an odd issue with my fuel trims keep going up to 12.5 my cruise and my wot.my idle fuel trim is at 6.4. car seems to drive fine and idle fine its smooth..im running pte 1200ccs for the scaling its set at 1194 and the latency is as follows: 3.195
2.205
1.515
1.050
.690
.510
.285

does all of this look correct at idle my wideband doesnt seem to work correctly its goes up to 16.1 and 17 then cycles back to 14 is this normal?? and are my scalings ok or do i need to scale the injectors down?? it cuts out past 20 psi as if had spark blow out or fuel cut all boost leaks were fixed prior to tuning it please help guys

 

[kanusky1990]

How are you tuning?

I see you have a Wally 255, do you also have a AFPR?

I ran without one forever with a wally 255, and trying to tune my injectors sucked.... It would idle fine, but under WOT is would run 11.5 when i had it set to 10.5

I thought I was running out of pump so I rewired my fuel pump and things got worse under WOT (ran into 12.5's when still set to 10.5),

Turned out I was overrunning the stock FPR. Picked up an AFPR and it fixed it.

As for your latency, I don't have my tune in front of me so I can't help you out there.

 

[talon913]

yea i still have stock fpr on it now that could be my issue that im overruning it.i thought you could go pretty high on them.im solid at 11.0 at peak were its set at.

 

[AK Maniak]

With that fuel pump you need an AFPR.

 

[talon913]

ohh ok ill have to grab one today then..my fuel trims seemed to have gotten better over driving it more at idle im dead on at 14.8-15.2 cycling

 

[AWDtalontsi96]

Just remember when scaling your injectors. the bigger number entered the leaner you make it. When doing latencies the higher the value the richer you will make it. Depending on your cams you will never see perfect 14.7 at idle. I am running gsc s3's my afr at idle goes from 14 to 15. rpms at 1100 , base timing set at 14 degrees. STFT at idle +/- 2% , LTFT low +/- 1% and cruising in LTFT mid stable around +/- 3% . Took me almost a week for driving and tweaking till i got i right.