Cold AFR doesn't follow commanded AFR
I was wondering what causes the WBO2 AFR to not match the commanded AFR when you start the vehicle cold? I have 3 cars I've done now and all 3 are the same.
I attached a log of the firebird, you can see that they are not even close. Any ideas where I could look?
Lee
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
I guess I should of attached the tune also.....
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
In SD this happens for me too,
but once the MAF is enabled and tuned it is cured.
512k RoadRunner Firmware 12.14R
FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
LC-1 WBO2
_________________________________________________
No way I'm putting a MAF on this car!!!
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
Nice ride,
look in the Crank/Start folder for other "options".
How about hanging the MAF from the rear view mirror?
Last edited by mr.prick; August 14th, 2009 at 05:09 AM.
512k RoadRunner Firmware 12.14R
FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
LC-1 WBO2
_________________________________________________
It looks like there's a real need for a true speed density OS, one that is scaled down without all the useless tables, kinda like the Holley commander software!!
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
yeah, that is nice. what color blue is that? i'm diggin' it.Originally Posted by mr.prick
Nice ride,
look in the Crank/Start folder for other "options".
How about hanging the MAF from the rear view mirror?
I've had the same issues with cold start AFRs too with both SD and MAF. if I ever figure out what it is I'll let you know.
OT, yay, bill cosby is back, no more vomitting dog.
1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos
That is a nice color blue, my old man had a '67 Firebird that was a similar color.
I missed the COZ too.
512k RoadRunner Firmware 12.14R
FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
LC-1 WBO2
_________________________________________________
yeah I was looking at simmilar stuff to paint my '68 firebird back when I had it.That is a nice color blue, my old man had a '67 Firebird that was a similar color.
I missed the COZ too.
that dog picture was disturbing.
1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos
Desired Air Flow numbers appear to be on the low side and idle spark is 36 degrees.
You have all of the spark tables with high spark values around idle and then have lowered optimal spark values compared to oem values around idle.
Aside from that, your actual AFR compared to commanded ain't all that bad.
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