P11 histograms

Anyone have any histo for these old pcms on alpha-N?

shouldnt bee to hard to make a new set.
do you have a wideband?

yes just set one up, havent ever messed with alpha N so a bit new to these

you need to connect to your vehicle and re-poll for parameters. once this is done add these channels to your channels list to make sure these graphs work:
if it asks for generic say yes....
commanded afr sae
wideband afr(transform as needed)
ignition advance sae
throttle position (%) sae
engine rpm sae

anything else is extra data.
always good to record vss speed mph, coolant temp, injector ms, injector duty %, knock sensors

go into your histograms and remove all pre-existing tables...(save them first if you wish to use them later)
download these histograms:
Attachment 89137
now you know which ones pertain to early alpha n

Thank you! Hopefully rain stops around here it?s my sons circle track car so it?s gonna be hard to log and tune in the rain lol. Thanks again for the info, it?s a 06 cobalt I backdated the harness to a cavalier one since the original ecm wasn?t tuneable. It?s still returnless fuel system so I know I?ve got some adjustments to make I?m sure.

Tune the idle table in. Record the average injector constant afr error histogram value.
Multipy the tuned idle ve by 1.1
The injector constant error should increase by 10%. If it doesnt do this then you need to adjust the injector constant until that does happen.

From there tune all the ve tables in and you should be good to go.