Hi everybody,
I tuned sierra 5.3L 2008, whenever I got the AFR @ WOT 12.8 by tweaking the PE, it doesn't stay constant after it shifts to the next gear 2, then 3rd. I got this 12.8 in the first one. Any idea??
It goes to 11.7 .... 10.8
Hi everybody,
I tuned sierra 5.3L 2008, whenever I got the AFR @ WOT 12.8 by tweaking the PE, it doesn't stay constant after it shifts to the next gear 2, then 3rd. I got this 12.8 in the first one. Any idea??
It goes to 11.7 .... 10.8
Regards,
Odd Boy
Any help gents!!
Regards,
Odd Boy
What are your mods?
It could be a few things, VE table needs adjustment,
injectors going "static", TP% variance ect.
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
_________________________________________________
He means "what are the modifications on this vehicle?".
ram-air and cat-back
Regards,
Odd Boy
Ditto. I have heard of this happening on other ECM's (Non GM, like aftermarket AEM for example), where the AFR is only constant in one gear. I would like more information and I watch this thread everyday.
A new aftermarket PCM called the ProEFI (made by the famous Jason Siebels of AEM fame), might have the capability to tune based on gear, AND I believe he is using a Bosch or Motorola late model style PCM (similar if not the same as GM uses stock).
I need to do more research into this ProEFI thing and see exactly which controller it is and how we can utilize it one day (maybe for circle track racing?)
Eric
here is the file
Regards,
Odd Boy
On my 2008 Silverado, I had the same problem, At WOT my AFR kept going below the command fuel setting's I had adjusted in table [B3618]. With the wideband fitted, and messing around with quite a few adjustments. On my truck(tune), the COT [B0804] was causing the overly rich condition. When I disabled it command fuel was right on,(using WBO2) when I re-enabled it, overly rich!!! So instead of disabling COT[B0804] I adjusted table [B0805] to match command fuel at WOT (richest setting in my tune) it's been working perfectly...
Last edited by GAMEOVER; February 2nd, 2009 at 08:24 AM.
2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2
FLASHSCAN V2 & AUTOCAL