Question about injector values

[CNCguy]

I may not be asking this the right way but bare with me. Do OBD-II ECMs use tables similar to OBD-I to define the characteristics of the injectors? My assumption is the tables are used to compensate for the injectors not having linear flow rates. I picked up a few books and one of the key points is that a good tune starts with properly defining injector flow characteristics. I am using OBD-I on an LZ9 with the stock Multec 3.5 injectors at 60 PSI and was wondering if it would be possible to use any of the information from an OBD-II in the OBD-I? I haven't had much luck finding flow data for Multec 3.5 injectors and thought an option might be to copy data from the appropriate ECM.

OBD-I uses tables:
Injector Offset vs Base Pulse Width
Injector Offset vs Battery Voltage

[robertisaar]

of the OBD2 BINs that i've played with, i HAVE seen those tables...

[geldartb]

here are all the tables accessible through tiny tuner from my 99 Grand am Bin.

[CNCguy]

So my next question would be if anyone know where I can find the stock values for LX9 & LZ9 injectors?

[Weatheralls Auto]

I would really like to find an LX9 bin as well, but no luck yet.
I am working on dumping one from an 06 Pontiac SV6, but even when I get it, I will need some help with tiny tuners and Ida to map it out.

[sprucegagt]

I may not be asking this the right way but bare with me. Do OBD-II ECMs use tables similar to OBD-I to define the characteristics of the injectors? My assumption is the tables are used to compensate for the injectors not having linear flow rates. I picked up a few books and one of the key points is that a good tune starts with properly defining injector flow characteristics. I am using OBD-I on an LZ9 with the stock Multec 3.5 injectors at 60 PSI and was wondering if it would be possible to use any of the information from an OBD-II in the OBD-I? I haven't had much luck finding flow data for Multec 3.5 injectors and thought an option might be to copy data from the appropriate ECM.

OBD-I uses tables:
Injector Offset vs Base Pulse Width
Injector Offset vs Battery Voltage

The injector flow tables as already noted are different.

As for your assumption, the answer is yes and no. Some models use a variable fuel injector flow table based on static injector flow per MAP (i.e. L67), while others only use a constant injector flow value regardless of MAP (N-body). As a result MAF and VE tables are considerably different between the two. The strange thing is both vehicles use the exact same injector flow rate table layout. A general rule of thumb is not to change this, meaning from variable to constant flow value from the stock arrangement.

As for the Multec 3.5 flow rate, did you check on Delphi's website? Most of the injectors listed also have there flow rate. I guess a better question would be what vehicles were these injectors used in?

[onefastV6]

Here is a LX9 .bin from a 2004 malibu, which I modded the OSID HEX so it will open in Tiny Tuner and DHP Powr Tuner software.

[CNCguy]

I am using the stock LZ9 injectors and was told they are Multec 3.5 and flow 27.8# at 400 kPa. From what I have read, injectors have become more linear through the years. I am using OBD-I and wanted to compare the newer offset values for voltage and low pulse width to the values used in the BFUZ BIN.

[Weatheralls Auto]

Here is a LX9 .bin from a 2004 malibu, which I modded the OSID HEX so it will open in Tiny Tuner and DHP Powr Tuner software.

Ahhh, I missed this Update.
Can I ask if you still have the Unmodified file? and what process did you ue to get it to open in DHP and Tiny Tuner?


Thanx.