Stock Tune differences?

[trailshredder]

OK .... This got me wondering. I have my stock (Pre EFI) tune that I pulled off my ECM the day I got EFI. It is untouched. I pulled a stock tune off here with the same OS and compared the 2 and there were huge differences. Am I missing something?

Here are the differences .....

Comparison summary: 08:18:18 am, Thursday May 07, 2009

Calibration comparison between Stock ECM Tune Pre EFI.tun and 2002_LB7_(15166853)_ALI.tun.
*Values that differ by more than 0.000001% are considered different.


B0502 "Desired Boost Intake Temp Multiplier" -0.7843 "Different from row 0 to row 13 inclusive."
B0503 "Desired Boost Barometric Pressure Multiplier" 0.0977 "Different from row 0 to row 9 inclusive."
B0504 "Desired Boost Levels With EGR Off" -8.6275 "Different from cell: 1,0 to cell: 25,22 inclusive."
B0505 "Desired Boost Levels With EGR On" -8.6275 "Different from cell: 1,0 to cell: 25,22 inclusive."
B0802 "MAF Expected Airflow" -9.3641 "Different from cell: 1,0 to cell: 25,22 inclusive."
B0804 "MAF Expected Airflow IAT Adjust" -6.2745 "Different from row 0 to row 8 inclusive."
B0727 "Throttle Base Injection Quantity" 2.8000 "Different from cell: 6,9 to cell: 17,10 inclusive."
B0751 "Max Injected Fuel Quantity, MAF (EGR Off)" 10.6563 "Different from cell: 1,0 to cell: 25,10 inclusive."
B0752 "Max Injected Fuel Quantity, MAF (EGR On)" 6.6563 "Different from cell: 1,0 to cell: 25,10 inclusive."
B0728 "Max Injected Fuel Quantity (Warm)" -10.8000 "Different from cell: 6,0 to cell: 16,8 inclusive."
B0747 "Max Fuel Quantity vs Speed" -48.0000 "Different from row 12 to row 12 inclusive."
B0748 "Pilot Injection Quantity" -9.1912 "Different from cell: 12,0 to cell: 20,22 inclusive."
B0908 "Injection Timing Base (A)" 4.4444 "Different from cell: 8,11 to cell: 11,22 inclusive."
B0910 "Injection Timing Base (C)" -10.0000 "Different from cell: 2,0 to cell: 25,22 inclusive."
B0929 "Injection Timing After Pilot Base (D)" -13.0469 "Different from cell: 2,0 to cell: 20,22 inclusive."
B0911 "Injection Timing ECT (A)" -8.8889 "Different from cell: 8,11 to cell: 11,22 inclusive."
B0915 "Injection Timing ECT (C)" 20.0000 "Different from cell: 2,0 to cell: 25,22 inclusive."
B0741 "Torque Limited Injection Quantity" 20.2125 "Different from cell: 1,0 to cell: 25,10 inclusive."
B1102 "Base Torque" 19.2057 "Different from cell: 1,0 to cell: 25,12 inclusive."
B1001 "Fuel Pressure Base" 16.0000 "Different from cell: 0,0 to cell: 25,22 inclusive."
B1002 "Fuel Pressure ECT" -8.0000 "Different from cell: 0,0 to cell: 25,22 inclusive."
B1006 "Fuel Pressure Baro" 9.0000 "Different from cell: 5,1 to cell: 25,17 inclusive."
B1505 "EGR Minimum ECT" 30.1961 "CAL: 31 <-> ALT: 135"
C0301 "DTC Test Enablers" N/A "Different from row 3 to row 137 inclusive."
C0302 "DTC MIL Enablers" N/A "Different from row 3 to row 137 inclusive."
C0801 "Boost Test ECT Enable" -6.2745 "CAL: 162 <-> ALT: 140"
C0804 "Under Boost Limit" -1.4649 "CAL: 7.3 <-> ALT: 5.1"
C1001 "Baro Test (ECT)" -31.3725 "CAL: 176 <-> ALT: 68"
C1002 "Baro Test RPM High" 32.9595 "CAL: 900 <-> ALT: 3600"
C1004 "Baro Test Speed" 29.2973 "CAL: 25 <-> ALT: 100"
C1005 "Baro/MAP High Tolerance" -0.0153 "CAL: 2.9 <-> ALT: 1.5"
C1006 "Baro/MAP Low Tolerance" 0.0153 "CAL: -2.9 <-> ALT: -1.5"
F0101 "Fuel Level Sensor Primary" -12.0000 "Different from row 33 to row 256 inclusive."
F0301 "Main Fuel Tank Size" -12.1125 "CAL: 34.00 <-> ALT: 26.00"
F0302 "Main Fuel Tank Size Full" -12.1125 "CAL: 34.00 <-> ALT: 26.00"
F0303 "Combined Fuel Tank Capacity" -12.1125 "CAL: 34.00 <-> ALT: 26.00"

 

[malibu795]

no 2 trucks are tuned the same reguardless of OS number.

i have seen tune that limit fuel from 75-90% of full fueling in a stock tune

 

[trailshredder]

Interesting ... I am wondering if I should run my scripts on this tune instead of my stock tune?

 

[JoshH]

Did you have any type of programmer before you bought EFILive?

 

[trailshredder]

Did you have any type of programmer before you bought EFILive?

I had an edge, which I thought didn't touch the ECM. Bought it used though. Who knows what someone else has done.

 

[JoshH]

If it was the Edge Juice, it doesn't change anything in the ECM. If it had some sort of programmer on it prior to you purchasing the truck, it may have some side effects from that still in there. I've heard Bully Dog is bad about that, but I've never seen any proof.

 

[wdino73]

If it was the Edge Juice, it doesn't change anything in the ECM. If it had some sort of programmer on it prior to you purchasing the truck, it may have some side effects from that still in there. I've heard Bully Dog is bad about that, but I've never seen any proof.

x2 on the bullydog

 

[MMLMM]

Not just OS numbers have to match, so do all the cal numbers.

1 of the tunes you posted looks like no egr vs other, also 1 is a long bed and one is short...

 

[GMC_2002_Dmax]

If it is your stock 2002 OS there were three depending on your emmissions requirements.

Federal
North East
California

Also the CA trucks had a different glow plug controller and IIRC could have also had an AIR Pump.

The best OS for a 2002 is the 15186006/Federal OS.

 

[THEFERMANATOR]

The best OS for a 2002 is the 15186006/Federal OS.

Works pretty good in an 01 to:thumb:.

Some of those differences in tuning can make for a slightly quiter engine at idle, but I don't reccomend using your old OS and them making the changes to it. I tried this and yes it made it quieter(even the wife commented on it being quieter), but the downside was that it would load up at idle after about 30 seconds and begin to lope. AFter a few minutes you would get a heavy diesel smell out the tail-pipe and some light smoking. I went back to stock and no more problems.

 

[Chevy1925]

The best OS for a 2002 is the 15186006/Federal OS.

just another reason i love my truck :grd: