TXBowTie40

iTrader: (2)

While going over some recent datalogs, I hit the play button TunerProRT and watched the ALDL page.
The BLM's, INT's, and other values there were different than what showed up on my datalog information.
For instance, at several points during the drive, on the ALDL screen the BLM's hit 138-141, while the datalog information only showed 128-134.
My vehicle is a 1993 Chevy K1500 with a Vortec 350 with TBI, ZZ4 cam, and some other small mods.
The PCM is the 16197427, running $0D code.
I was concerned because the ALDL values more closely reflected the readings I was seeing on my WBO2, an Innovate LC-1, which were at times around 15.6-16.2.
Which set of values should I be trusting, the ones saved in the datalogs, or the ALDL ones?
Gonna recalibrate the WBO2 this morning and do more logging, try to figure out why the #'s are off from what the datalogs are showing.

Ronny

iTrader: (1)

I dont think there is a relationship BLM to WB readings.

NB feedback to ECU is attempting and I will assume successfully to place A/F at stoich where all fuel is being burned cleanly. whether BLM is at 129 or 138 A/F should be at stoich. Only when BLM is maxed at 110 or 169 we can say A/F is not at stoich as ECU cannot control as out of bounds. the WB is reporting accurately the A/F it sees.

WB can be fooled if there is overlap/reversion due to cam but I suspect that not occurring with your cam. What are specs? Not sure how to confirm that.

I have setting in bin for stoich set to 14.3/1 and the low median high 02 sensor switching points set about 10% high(richer) than stock EBL.bin.

My engine uses a heated NB Delco and is running engine at stoich I will presume. I Have not looked a plugs for a couple seasons. My WB Innovate also shows cruise at 2200 rpms to be at 15.0/1-15.3/1 with Highway and DFCO disabled. My cam 224/230 @.05 114 LSA. Maybe I have some unburned finding its way to WB? Maybe not.

TXBowTie40

iTrader: (2)

Thanks, Ronny! I read your post and smacked myself on the forehead when what you said sunk in........I need to incorporate the WBO2 into my datalogging so I can compare what it is saying during driving.
The ZZ4 cam specs are 208/221@.050, .474/510 lift with 1.5 rockers (which I am running now, sold my spare set of GMPP 1.6 RR's), and lobe centerline of 112. I had a more detailed cam spec somewhere, can't find it now.
I had completely forgotten that the NB O2 is just that....NARROW BAND and wasn't seeing what the WB sensor saw.
I have my stoich AFR set for 14.7, may adjust it a bit.
Haven't messed with the NB voltage gates any....
The Innovate sensor is a Bosch heated one that came in the kit. Did a recalibration today and noticed an immediate improvement in driveability and idle and responsiveness.
I'll post more once I get a line run so I can see the WB readings in the datalogs.

TXBowTie40

iTrader: (2)

Is there a particular .bin or WB patch I need to install to be able to feed my WB02 readings into the datastream?
I have an .ads file that has "WB02", but even after connecting the analog 2 wire from the LC-1 into pin B16, it doesn't react when you are connected and the engine is running.

Ronny

iTrader: (1)

7427 PCM. I would shoot and email to Magnus(TunerProRT) and determine that. Or go to his site and see if any comment given regarding patching in the WB datastream. I know my EBL supports that function. May want to post another thread and ask that Q and another user can respond.

TXBowTie40

iTrader: (2)

Thanks, Ronny........I sent him an email a few minutes ago.
Hopefully he can clue me in.
I posted a similiar thread in the TBI forums, too. Maybe RBob or Fast355 or someone else can point out what I am missing here......