please help...

[joecar]

ok good deal.

[Jayyk31]

Joecar can upgrade to MAFLESS cos without upgrading my OS? Im using 2088. Im not boosted but ive been thinking about running SD .

[joecar]

Yes, you can run MAF-less without a COS (for example on 12202088), altho you lose the HO/LO adaptive spark feature (it disables when MAF DTC is present);

( i.e. the COS retains HO/LO adaptive spark )

[Jayyk31]

Ok so with 0288 OS can i just upgrade to a COS to retain the adaptive spark? Or do i have to 1st write entire 2156 OS? And what is it, COS 1, 2, or 3???

I was reading this info b4 that this should be in my files somewhere?

GM O.S = EFILive O.S
2001 Programs
12202088 = 01250001

[joecar]

I would use COS3/01250003.


( note that you need 12212156 only if you want to run COS5 (TP VE table) or if you need to run a 4L80E transmission )

[joecar]

The blank COS tune files are in this folder: C:\Users\<you>\Documents\EFILive\V7.5\Bins\Custom OS

[Jayyk31]

Ok i gotchya! Thanks Joecar i really appreciate you always helping me out! Im gonna look into that and i might go for it. It will free up some room for my intake to get rid of that MAF tube.

[Jayyk31]

The engine is "breaking up" when i rapidly step on the gas. AFR goes way rich, in the 9's, and engind hick ups, or breaks up. Im tuning in OLSD doing "auto VE". Its been happining consistantly now. Anyone see anything? Heres abquick pic (not 100%sure if this is the spot) but i will post my log when i get to my pc... thanks

edit...
tune and log posted

[joecar]

Several things to consider:
a. is your wideband working properly...?
b. PE enable (B3616) and PR fueling (B3618) are insufficient.
c. IFR table does not quite match injectors.
d. Log shows rapid heat soak (even on short idles).


You might want to fix PE:
- set B3616 to 60% below 3000 rpm. 30% above.
- set B3618 to EQR 1.175.

Questions:
- are you running E10...?
- which wideband are you using...?
- are you (will you be) running front NBO2 sensors...?

You might want to start over on the VE table after getting the wideband to work properly.

[joecar]

Also:

EOP (engine oil pressure) pid won't work unless PCM is from a Corvette or you wire/pin oil pressure sensor to PCM (and enable it in the tune).