lean tune

[southern]

I have been tryin to get rid of my lean problem. I tried auto ve but got the same bens two or three times and still not running richer. So can yall look at my tune and log and see what yall think cause I am stumped.


2004 GMC ECSB Z-71 AEM Longtubes Modified with 3" Magnaflow, Intake, EFI Live, PLX Wideband, 206/212-.515/.522 112, stock heads milled .030", Patriot gold dual springs, comp pushrods, E-Fans

[swingtan]

Well..... For starters I'd disable Closed Loop mode. Your LTFT's are pulling 9% so I'm guessing you are trying to add fuel, but the O2's are pulling back out. The difference you are seeing in the commanded vs measured AFR's are probably due to a ground offset in the PLX. Are you running the Analogue connection from the PLX or has it had the serial connection mod? Running a serial connection will eliminate the ground offset.

Simon.

[Gregs]

you can't accurately tune the ve table unless you are in ol with the maf failed. read the tutorial on doing autoVE and follow the steps to modify your tune. the computer takes a combination of the maf sensor and the ve table so you have to fail the maf sensor and you need to force the engine to run in ol with o2 sensors disabled

look over this tune and compare it to the one you provided

[southern]

That is not a ve tune just a tune with the ve table from my ve tune. set up in ve tuning the wb still gad the same bens after to logs and retunes. as for the wideband i am just using the orange plug that cam with it. i have not heard about any other way to hook it up. but like i said in ve mode it kept reading lean.

[Gregs]

The tune I posted is what you need to run, do a log, apply bens...and so on and so forth. if your bens aren't changing anything after you've made a new tune then i'm thinking something must be wrong with the wideband setup somewhere, but i'm sure someone who knows more that i do will step in here soon.

[WeathermanShawn]

Are you sure you do not have 'Lean Cruise' Enabled?

[southern]

all lean cruise tables should be zeroed and disabled. unless you have to do a full flash to disable it. can anyone shed some more light on the wideband upgrade? thanks come to think of it it requires a full flash to activate so it should take a full slash to disable it right?

[southern]

i take it the wb mod is for v2 only i am still using v1.

[Gregs]

i did a full flash to enable lean cruise a while back. to disable it all i did was zero out the tables

[swingtan]

i take it the wb mod is for v2 only i am still using v1.

Correct. Serial WB logging is only available with the V2.

Are you sure you do not have 'Lean Cruise' Enabled?

Looking at the commanded AFR would indicate that Lean Cruise is not enabled.

I'll stick to the CL issue at the moment. You can not adjust the VE table using a WB BEN if you are still in CL. To make matters worse, you seem to also be using the MAF still, so any adjustments to the VE will make very little difference anyway, as the MAF takes precedence.

Simon