turbo jeep 3.8

[johnwrench]

So if i did the math right. So 73lbs/hr = .009198 g/ms X injpw=fuel mass if this is right then just have to rework VE table

[johnwrench]

thanks thats great

[Scottyb_288]

Did you make VE adjustments? And yes from what i can tell and the info youve given your math seems to be correct.

[johnwrench]

I just tried new numbers. idles is now around 10.5 to 11AFR.but as soon as i put it in gear it goes right to 14.7 and runs there right up to WOT then it floods out. made some adjustments on VE biggest error was 7%. put in a little more fuel with stoich got AFR down to 13.8 will take it down more after i get idle in park up some. Thinking injoff set may be off play with it tomorrow

[Scottyb_288]

Figure anything out with this?

[johnwrench]

Getting closer the WOT flooding was converter overtemp and Exhaust overtemp setting. but fuel ratio commanded is 14.7 and can't find a way to lower it. but its running good now just need FA down to
12.5 to 1

[Scottyb_288]

12.5 at WOT or idle? did you get the rich idle in park straightened out?

[johnwrench]

it's commanding 14.7 all the time idle and WOT. trying to get it to 12.5 but everything i try dose nothing. need to read more i think
i tried a different inj offset now idling at about 14.

[Scottyb_288]

What year is this jeep? Does it have nueral network?

[B00STJUNKY]

Are you trying to disable closed loop fuel control, and run it rich at low load/part throttle intentionally for some reason? Typically you would want to allow the PCM to maintain control of closed loop control at part throttle conditions (which will then use Short and Long Term Fuel Trims to bring AFR into 14.7:1 - or more accurately, a Lambda of 1.0) in order to maintain some sense of decent fuel economy, and so as not to run it excessively rich at low load and wash out the cylinders. 12.5 is an OK AFR to run at WOT, but normally with turbocharged applications on pump gas, I try to run them a bit more conservative than that, especially depending on how restrictive the hot side of the turbo setup is.

Have you looked over the WOT Delay settings? That could be part of the problem if there's a delay set up.

[johnwrench]

it's a 2008 i did play with the WOT delay but need to learn more. part throttle is running good for the most part. have trouble with my inj plugging up and sticking they where setting on a shelf for the last five years may need new one. still working out bugs. so it's put on hold tell i get inj working or new ones may

[duster360]

johnwrench use this Inj data. It was derived from injector data directly from Siemens.


Jesus, it's the blind leading the blind,,,Trying to use a fixed scalar to increase the entire injector mass flow 300% is just F'en hack.


IPW.....mg/c
20000-182.0032
14000-127.4022
8000--72.8013
6000--54.6009
4000--36.4006
1784--17.3492
1280--12.4479
1192--11.5921
1080--10.5029
984----9.5693
880----8.5579
784----7.6243
680----6.6129
0------0.0000

[alwaqqas]

did you solve the problem?