Help with tune adjustments

[joecar]

If the MAF pegs at maximum, then that is the value used... stays in MAF'd mode.

[SuperChevy]

Alright- just finished installing a PLX WB sensor. When testing the gauge the truck seems to be running way lean so I am going to run through the calc ve and see what I learn.

[joecar]

Do you have a V1 or V2...?

[SuperChevy]

I am using a V2.

So far I am not getting a reading off the PLX analog out....still working on it

[SuperChevy]

Okay- I was using the wrong PID- i picked the one for PLX and did not select the ext.ADX pid.

[joecar]

The PLX has serial comms output... are you using this to read the AFR/lambda into V2...?

[SuperChevy]

Yes- I am using it to provide afr data to the log.

I do not think I logged the correct info though as I only got zeros in the map- see attached.

Log_WB Working 0002.efiCustom Base_EFIMuscle_0008.tun

[SuperChevy]

Alright I got it now- I had accidently selected % when my tune runs with kpa. I am going to get a chance tomorrow to take it on the road and get a log under load.

I do have one question- so far the WB has not sat still at all- it is constantly swinging from 12 to 20 (mostly from 16 to 20). Is this common or is it possible I have an intake leak or some other issue? The tune does not appear to have that rough of a curve in it.


Thanks again for everyones help in guiding me along.
G

[WeathermanShawn]

Alright- just finished installing a PLX WB sensor. When testing the gauge the truck seems to be running way lean so I am going to run through the calc ve and see what I learn.

SuperChevy, the CALC.VE and CALC.VET method of Tuning utilize closed-loop. Your tune appears to open-loop..(see Table B4205).

I have not followed your thread through its entirety, but don't you want the Serial WO2 pids and not Analog?

[SuperChevy]

This is where the newbie would be applied.......I thought analog was good enough to perform a calc.ve- do I need to make the WB feed the pcm in order to be usefull?