Custom Operating Systems [Archive] - Page 2

PE And Boost VE {A0009} (11 replies)
Upgrade options for a car with 09381344 OS (2 replies)
Strange Problem with COS Setup (1 replies)
Boost fueling tables (5 replies)
cos3 or cos5 (0 replies)
cos3 sem-clsd (5 replies)
Finally did the wiring end of my COS5...... (1 replies)
Two step help please (11 replies)
too rich? (13 replies)
Can not reprogram pcm for new OS (4 replies)
V2 questions (2 replies)
Switch from OLSD to OLMAF (0 replies)
larger high impedance injectors (14 replies)
help! rich at idle (3 replies)
Just installed COS5 - Questions (5 replies)
cos3 to cos5 (3 replies)
COS#3 adding timing (3 replies)
E38 ECU, S/D operating system, forced induction. Barometeric updates? (5 replies)
For those who upgrade to a COS or have severe surging at idle (2 replies)
Why run a Custom Operating System??? (2 replies)
08 g8 cos (4 replies)
COS 5 have outputs? (1 replies)
Where to start. (3 replies)
E38 Fans patch not being applied (8 replies)
Help with cos3 (2 replies)
pulling timing not in program (13 replies)
Speed density run. (8 replies)
COS for 4.3L Vortec V6? (14 replies)
Help resetting OS and calabrations to stock (2 replies)
B3647 help? (3 replies)
COS' temperature model (1 replies)
need a starter tune (0 replies)
Cold Start Enrichment in pre-2003 COS (38 replies)
C.O.S. will not load. (0 replies)
Cos3 (2bar) (7 replies)
map rationality (0 replies)
Lean COS5 startup, tune and log included (0 replies)
Setting up for semi open loop (13 replies)
COS3 running rich (10 replies)
Comparing tune table lists (0 replies)
is there cos for 00' (10 replies)
Help COS5 Semi OL STFT ? (3 replies)
Newbie to EFILive, Just a Few Dumb Questons (1 replies)
Few questions after COS3 flash (0 replies)
Custom Op Sys--which one? (7 replies)
Fuel Problem COS3 E40 (10 replies)
please explain (7 replies)
need help with tune file. Please look (15 replies)
cos 5 on a c5? (5 replies)
!etc?? (2 replies)
Interesting day at the inspection station... (4 replies)
VE multi (5 replies)
COS5 Help (3 replies)
2005 to 2007 OS (5 replies)
cant upgrade to COS3 (11 replies)
Help my spark advance is too high (6 replies)
Os 01251057 (1 replies)
stft (1 replies)
Anyone have 04110003 Auto Gearbox file (13 replies)
Concerned and aggrivated (45 replies)
Lean Start Problem with pre-2003 OS (0 replies)
2001 Vette Stock Tune Needed (1 replies)
Need help - newbie (4 replies)
AutoVE with V2? (4 replies)
Reduce Engine Mode No Code (2 replies)
COS5 question for ROSS (9 replies)
couple of questions..... (0 replies)
Vortec PCMS (7 replies)
Where is all my fuel going? (2 replies)
Linear-fill (13 replies)
E38 Os (15 replies)
V1 V2 Commercial Custom OS (2 replies)
N20 Switch wiring with OS5 (9 replies)
PCM Terminals (2 replies)
Main and Boost VE...one table? (9 replies)
COS3 initial NA setup, B3647, A0014 and A0008 ????s (2 replies)
Setting B3647...accurately..ish??? (6 replies)
Pids don't respond! (4 replies)
Setting up the N2O Modes (1 replies)
Who runs a COS on a NA setup? Pros/Cons??? (10 replies)
"Launch box" w/ COS? (6 replies)
Idle surge coming to a stop (8 replies)
99 to 2002 calibration (7 replies)
custom OS with efi v1 (4 replies)
Formal Request for COS5 for 1MB PCMs (04 GTO, etc) (44 replies)
LS2 E40 2 Bar Custom OS (2 replies)
0411, marine intake and 4L80E (8 replies)
P1516 - Custom OS 02612557 E40 (0 replies)
post up COS5 tune files (4 replies)
looking for recommendation... (0 replies)
can't get BEN filters to open (0 replies)
Could you Guys Please look at my tune............. (0 replies)
What OS To Use? (1 replies)
Boost VE map............... (3 replies)
Custom OS on 0411 PCM for L31 Vortec? (11 replies)
Can You Guys shed some light on this for me............... (12 replies)
os3 in 02 zo6 timing problem (4 replies)
help with COS5 (0 replies)
moving to co3 (3 replies)
2004 GTO (OS 12587604) COS options (5 replies)
cos3 in o4 vette (2 replies)
car wont start with COS#5 (3 replies)
Can anyone help with a couple of problems? (9 replies)
Upgraded to COS3 and have problem...... (5 replies)
Ship Shift (3 replies)
Math for the VE multiplier (13 replies)
COS5...which table controls the commanded AF <100F ECT at start? (1 replies)
Which maf fail numbers are you using for C2907 and C2908? (1 replies)
COS#5 for 2004 silverado (7 replies)
COS5 With A 2 Bar Map Sensor Question (6 replies)
Start up A/F's (4 replies)
Spark Retard (3 replies)
How do you change the VIN when upgrading to a newer OS? (3 replies)
Help: Loaded a COS but can't load Cal (4 replies)
COS3 and COS5 lean cruise PE Mode AFR error (3 replies)
Is there a tutorial for changing your OS to a newer one? (4 replies)
lean not sure what i am missing (3 replies)
Will 12212156/COS5 run on PCM used in 2003 Z06...? (3 replies)
Getting trans segement into COS3 (2 replies)
lean wot with big ve numbers and low injector duty cycle (3 replies)
semi closed loop (11 replies)
COS5: Difference in A0008 and B3632? (1 replies)
B4005 Small Pulse Adjust How does GM create this table? (44 replies)
COS3 out of range calibrations (2 replies)
HP Tuners Custom OS for Real Time Tuning compared to EFILive RTT? (10 replies)
OPEN-LOOP based fuel control in Cos 3...question. (12 replies)
OS#09381344 to COS5 ?'s (4 replies)
nos (0 replies)
Can't flash to COS!? (11 replies)
How do you log misfires in COS5? (18 replies)
No GM PIDs and no VIN with COS3 (8 replies)
stuffing a 512kb os in a 1mb os... (7 replies)
B0109 (2 replies)
2004 Monaro PCM (8 replies)
where do I download COS#5 (6 replies)
2 step (2 replies)
COS for 2006 OS (7 replies)
COS 04140003 lean problem (4 replies)
A0014 (19 replies)
Slightly OT: where to put the Valet switch? (2 replies)
COS 5 and Auto VE Tuning Question (5 replies)
Need a little help gettin started on COS3 fine tuning. Please (0 replies)
Need some help with a few issues: tune inside (7 replies)
Rich cruise in COS5 (0 replies)
Knock after COS #3 install, but never had knock before (12 replies)
How to combat IAT swing? (4 replies)
Custom OS Locking Ability (1 replies)
A0011 out of range... (11 replies)
2004 gto pcm connector colors... (0 replies)
Service vehicle light with custom os? (6 replies)
Cos 2 (5 replies)
Dfco (0 replies)
Car reduced power mode/dies after idling with A/C on for a bit (1 replies)
Compare feature (2 replies)
Trouble loading 2002 OS in 1999 PCM (36 replies)
Loaded Custom OS: 03Z06..starts/dies after 1 sec (12 replies)
2005 Cos3 (24 replies)
7.4.2 Cos (5 replies)
Boost Timing Table (2 replies)
Co#5 (7 replies)
B5908 (3 replies)
E40 Valet mode? (1 replies)
Loging A0009 (1 replies)
Valet Problems (3 replies)
3 bar help (14 replies)
starts for 1 sec and then dies (6 replies)
B3647 = A0008 ??? (12 replies)
Injector Flow Rate question (5 replies)
Accel enrichment (15 replies)
No Communication After Reflash? (4 replies)
COS#5 help (4 replies)
timing map (3 replies)
98 Custom operating system... (12 replies)
custom operating system nos (9 replies)
Anyone disconnected their front O2's after open loop programming? (6 replies)
Stuck from the beginning (as usual) (8 replies)
cos 5 with trans brake and n2o (1 replies)
charge temp blending (3 replies)
Auto VE setup with CO 3 (5 replies)
Where did all the COS go? (3 replies)
COS for E40 and fans (5 replies)
2003 Vette twin turbo done with OS3 (10 replies)
OS files (10 replies)
Looking for help, having some VE tuning trouble (7 replies)
COS types and abilities? (13 replies)
Service Number 9354896 (13 replies)
Lean spikes commanded vs actual AFR (19 replies)
COS5 with 60 lb injectors (22 replies)
New COS3c Problems (7 replies)
COS idea (13 replies)
Custom O.S #3 Update for 2003+ (16 replies)
Forced octane scaler (5 replies)
COS3 cold lean startup solution (32 replies)
Custom operating systems for 2006 models (2 replies)
Copy and Paste (4 replies)
Dual Spark Maps - Difference ? (3 replies)
help ????? 2000 to os5 and maps off wack (12 replies)
Custom Os??? (1 replies)
Weird AFR at idle (3 replies)
Thanks to Black02SS, my EFI Live COS5 sd tune is running great! (6 replies)
COS #3 to COS#5 (2 replies)
COS5 question on STFT's (9 replies)
Weird Problem (8 replies)
limp mode (1 replies)
Changing the scaler number in COS5 doesn't change the key on engine off map reading?? (2 replies)
COS5 shuts the engine down after 3 seconds...help! (29 replies)
04140003 VZ Custom Op (4 replies)
lean cruise in OS3 (18 replies)
Another issue with C5 SD tune.. (4 replies)
Problem with 04 Vette and speed density (ETC?) (4 replies)
2 bar MAF with custom O/S?? (1 replies)
Why doesn't SAE.MAP not work? (2-bar) (2 replies)
Custom OS#5 (8 replies)
B6245 and B5911 Units ??? (2 replies)
Tutorial (8 replies)
Full Reflash (12 replies)
Reading PCM (9 replies)
N20 Switch wiring with OS5. (3 replies)
Newbie OS Question (7 replies)
B3647 Question?? (28 replies)
Opps, Need Emission Test (9 replies)
wide band o2 (11 replies)
AutoVE not working - SOS! (17 replies)
Custom OS went screwy? (5 replies)
Strange MAF&MAP tune issue... (1 replies)
OS5 TPS VE Table setup? (4 replies)
I have a 1998 Camaro.. (6 replies)
Maybe stupid questions ... (4 replies)
reflash operating system (0 replies)
How do 98's fit in? (10 replies)
Commanded AFR stuck at 12.53 after warmup (11 replies)
A0008 OL ECT Command Fuel Multiplier (16 replies)
Upgrading from 2k OS (5 replies)
Which OS? (9 replies)
ETC question for Ross/Paul (and anyone else who knows ;)) (8 replies)
Personal to Commercial required? (2 replies)
Need help SD (5 replies)
Which PCM connector for valet wiring? (3 replies)
99 -> 02 OS upgrade questions (9 replies)
Os Faq (15 replies)
COS Idea. Cylinder Balance percentage. (0 replies)
New here...I think i have a helpful write up for an OS swap... (8 replies)
COS5 Question???? (28 replies)
Custom OS, now no PCM comm's (2 replies)
COS #5 what am i doing wrong!!! (10 replies)
Need a COS5 120205 Tune. (1 replies)
Lean Cruise 2002 Vette (5 replies)
Update to the Camaro 02 OS 12212156 (4 replies)
Dual spark maps, let me get this straight???? (4 replies)
2005 Custom OS3 in a 2006 Truck? (5 replies)