Ecotec 3.8 V6 Questions

[PhantomOfHeat]

I am looking for a stock .bin file for a 2003 Ecotec 3.8 V6 N/A, 01 or 02 might work.

My question is can the above ECU do a Lean-Burn Cruise and is it enabled?

[PhantomOfHeat]

So is nobody able to edit the ECU? Is editing the ECU an American thing?

[chargedvx6]

Yeah they do a lean cruise but the programming language will be different between the Aussie ECU (Delco) and the U.S. (Delphi) most likely. Unless you can convert it or are willing to pay someone to do it from here it's a mute point?

[PhantomOfHeat]

Thanks for the reply Chargedvx6.

Although Aussie ECU is (Delco) and the U.S. is (Delphi) I do not think that the programing language will be that different since they are both OBDII. I believe in 1997 Delco was mostly transfered to Delphi and in 1999 Delphi became a separate publicly traded company but still used the Delco name on some items till 2004.

I guess my next step is to get a Aussie VIN and/or OSID for the ECU and see if it has a parent OSID from the U.S. If it does that will ensure that they use the same operating system.

It would be a great help if you could get me a picture of the ECU top, bottom, and connector. That way I will have some idea what I would be working with if I decide to buy a Aussie ECU and start decoding it.

Thanks for your help,
Sean Henry

[chargedvx6]

All the tuning gurus are here delcohacking.net • Index page

US/ GM ECU thread delcohacking.net • View forum - US GM ECU's

[delcowizzid]

yip head over to delcohacking.net look for vx and vy tuning can now suck the tune out tune it and flash it back in

[VL400]

Yeah they do a lean cruise but the programming language will be different between the Aussie ECU (Delco) and the U.S. (Delphi) most likely. Unless you can convert it or are willing to pay someone to do it from here it's a mute point?

The aussie ECU's code was actually written by US engineers, all written in assembly.

Thanks for the reply Chargedvx6.

Although Aussie ECU is (Delco) and the U.S. is (Delphi) I do not think that the programing language will be that different since they are both OBDII. I believe in 1997 Delco was mostly transfered to Delphi and in 1999 Delphi became a separate publicly traded company but still used the Delco name on some items till 2004.

I guess my next step is to get a Aussie VIN and/or OSID for the ECU and see if it has a parent OSID from the U.S. If it does that will ensure that they use the same operating system.

It would be a great help if you could get me a picture of the ECU top, bottom, and connector. That way I will have some idea what I would be working with if I decide to buy a Aussie ECU and start decoding it.

Thanks for your help,
Sean Henry

The Ecotec are still OBDI. You can use this information and program to get the binary out of your PCM .. delcohacking.net • View topic - The FlashTool V1.23

[PhantomOfHeat]

Thanks for the help and pointing me in the correct direction. I will be checking out delcohacking.net

Just to make sure I have this correct all ecotech 3.8s even the 2000+ series II (US L36 and L67) are OBD-I? I find that surprising since the US Series II were all OBD-II. If that is the case it will take a bit more work and would be easier if I still had one of my 1993 3800s.

[VL400]

Yep, the first V6 to be OBD-II was the VZ alloytec (MY 2004). The VT series II LS1 (MY 2000) was the first V8 to be OBD-II. We were way behind with adopting OBD-II with the Commodore range.

The fact its OBD-I does not make it more difficult, there are now free tools available to do anything on the PCM. The VU/VX/VY NA V6 uses a flash memory PCM and the L67 a memcal (EPROM) PCM. The actual program is specific to the aussie models, wont find the exact same program in any US PCMs. However the code does share lots of similar routines with US based PCMs.

Here is a pic of the VU/VX/VY flash memory PCM ... delcohacking.net • View topic - VY PCM - 16269238

[PhantomOfHeat]

The reason that OBD-I makes it harder is that my car is OBD-II so it is more likely that the assembly code is different enough that it will not be as easy to use an Aussie ECM to locate the lean cruse portion of the code.