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  1. In-Tech, Thanks for the help. I have access...

    In-Tech,

    Thanks for the help. I have access to a copy of J1979, and had seen the different modes listed before. That was why I figured that I needed to understand how mode $06 and $07 worked. I...
  2. Requesting System Readiness Monitor results.

    Trying to understand how the system readiness monitors work. With commercial tools, you can click a button and it will show you all of the "results". These results are for both non-continuous...
  3. Yes, this is what I am trying to do. It looks...

    Yes, this is what I am trying to do. It looks like guys are having to rob another ECM to get the header pins, then they can either solder, or use DB9 pins, etc... to make the connections. Sounds...
  4. Looking for TBI ECM conversion pin connectors

    Odd request, but I am working on a project to adapt to my old TBI engine. I am wanting to unplug the current (still works) TBI ECM, and hook in another ECM which has different style connectors. ...
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    EE Hack - End of Injection Target table

    I was wondering if anyone has had any luck tuning larger fuel injectors with larger duration camshafts to reduce the rich exhaust smell at idle. On the LS PCM's there is a table which controls the...
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    Creating Camshaft Signal

    Looking to build a circuit to create a cam signal using the crankshaft signal for doing some bench testing of an ECM. I made a crankshaft signal for my bench test rig using a 555 timer chip. Now I...
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    I did some more thinking on the fueling part. ...

    I did some more thinking on the fueling part. With no cam position sensor, the 0411 will be in batch fire mode. This means that it will try to fire each bank 1 time in 2 crankshaft revs. To get...
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    Found a copy of the ignition wiring diagram over...

    Found a copy of the ignition wiring diagram over on lt1swap.com. Guess now I just need to get my head wrapped around what kind of signals are being sent to / from the different type of ignition...
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    do you happen to have a wiring diagram for this...

    do you happen to have a wiring diagram for this setup?
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    dave w Thanks for sharing that excellent...

    dave w

    Thanks for sharing that excellent diagram of whats going on with the ignition control module. I realize that it is not a TBI computer, but I am just hoping to figure out what signals are...
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    Looking at the TBI wiring diagrams, it looks like...

    Looking at the TBI wiring diagrams, it looks like the very important crank sensor signal actual comes from the spark module. I think it is called "reference" on the TBI diagrams and comes in on pin...
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    dave, That looks pretty slick. Is there no...

    dave,

    That looks pretty slick. Is there no way to keep the TBI injector setup? I know the performance of the TBI is not the greatest, but was hoping for a more "bolt on" setup. There was a guy...
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    Using a 0411 PCM to run a TBI?

    I know this is very redneck, arguably, lazy way to do a setup, but it also has to do with what I have laying around. With all the fantastic work that has been done on LSDroid, I think the usability...
  14. I have not done this on an 0411 PCM, but FWIW,...

    I have not done this on an 0411 PCM, but FWIW, this is the basic 2 bar MAP hack that had been used years ago when we didn't have custom OS's. I know for the old LT1's (EE hack version of PCM's),...
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    I'm not sure it really matters, but there seems...

    I'm not sure it really matters, but there seems to be only a few devices that are "genuine" ELM327 products. If you believe the internet, basically all the China ones are clones which do not have...
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    ELM327 USB scan tool

    I know there are a bunch of adapters out there but most of them are Bluetooth and or WiFi. My old bench laptop doesn't have Bluetooth and the WiFi doesn't work very well. Can anyone recommend a...
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    This is probably a stupid question, but do you...

    This is probably a stupid question, but do you have to be able to break the seed/key code in order for this to work? Or does it do something different, where it doesn't need to worry about the...
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    Are you using any kind of OBD II tool to help...

    Are you using any kind of OBD II tool to help with the reverse engineering? I am looking at getting one to help understand what kind of string gets returned from a given request.
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    I am currently working on a few different things...

    I am currently working on a few different things trying to understand a 2001 OS that somebody did a disassembly on. I will go back and find the exact PIDs that I am working on to see if you had...
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    Questions about PID groups

    Looking at the PIDs listed under the 2001 OS (12212088) and noticed that there appears to be several different groups. I understand the SAE PIDS which are listed as 00xx (example 0011 is the TPS %)....
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    Check to see if the bank 1 and bank 2 O2 sensors...

    Check to see if the bank 1 and bank 2 O2 sensors are swapped. Also, try unplugging them to see how the engine runs in open loop. If it's still dumping fuel, then you will know to check the...
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    Do you have a copy of the message string that you...

    Do you have a copy of the message string that you used? I'm hoping that it might be close enough to try.
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    How to monitor RAM memory - OBD II

    As I've been trying to figure out a LS1 disassembly, one thing I have noticed is that most of the math/calls/comparisons are being done the memory above the flash section. (e.g. - the stuff above...
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    DTC's and Output assembly code

    Finally getting through more pieces of a LS1 disassembly. I am slowly figuring out where things happen, but am still a little confused as to HOW. The assembly code is stored from $00000 through...
  25. Thank you for the quick response. As I was...

    Thank you for the quick response. As I was reading more of the code, that was what I was thinking but didn't quite have the logic all figured out.

    I do have another question, regarding when /...
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