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
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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
Any help gents!!
What are your mods?
It could be a few things, VE table needs adjustment,
injectors going "static", TP% variance ect.
what do u mean by "your mode"?Quote:
Originally Posted by mr.prick
He means "what are the modifications on this vehicle?".
ram-air and cat-back
I've seen this before, but I do not know the exact reason... the load is changing but the tables are not accounting for it...Quote:
Originally Posted by odd boy
Post log/tune files.
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.Quote:
Originally Posted by joecar
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
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...:)
Many thanks to u boss
GAMEOVER, I like that solution, make the COTP AFR (is that what that table is?) the same as PE... :cheers:
I did it and it is okay now thaaaaaaaaaaaaaaaaaaaaaanksssssssssssssss
Our 08 2500 HD runs 11 to 1 during COT.
What a PIG!http://forum.efilive.com/showthread.php?t=9467
are there any tunes for this gasser out there? and what kind of tunes are they? economy? perfprmance maybe? thanks in advance!