Originally posted by BM Computer Src
www.bmcomputersource.com/dscollection.html
Please check it out, and contribute or learn if you like!
I hope this is what you mean,
I spent some time looking at the runs posted and have a few notes.
Cat1-1
The FAPE is perfect the O2 voltages stay right up there thru out the run. Very conservative WG DC 65% and drops to 48.9 in 3rd gear.
Cat1-2
THE PERFECT EXAMPLE OF WHY NOT TO TRUST O2 VOLTAGES.
You'll see a commanded AFR of 11.6, at 765 millivolts at 391
Then 10.3 commanded at 1208 and it's 780 millivolts!!!
This is why tuning to a given O2 voltage is so darned bad. You changed an AFR of 1.3 in 15 one thousandths of a volt.....
Also is running 21d timing, and triggering the K/S. Would be better with less timing.
Cat 3-1
WG is 100% all the time.
Again, at 364 the commanded AFR is 11:1, and an O2 of 788
Then at 804 is 8.0 commanded, and O2 voltage of 804
Bad thing at 305 the MAF drops out the engine goes lean, and look at the knock.
Cat4-1
Looks like a shuttle launch.
Darned thing is a rocket
With on and off the gas things never really go stable for a real good look see at what's going on.
Again, 9.9 AFR at 671 is 671
then 11.5 at 775 is 729, O2
So richer in this case dropped the O2 voltage.
Bottom line,
Using info supplied by others,
O2 voltages are about meaningless.
A MAF drop out, is bad news Knock wise.
Just my 2 cents worth.
Not meaning to bash anyone, just items that I see. Any other comments if they are within the realm of this thread, I'd like to compare notes on what ya'll see.
HTH