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  1. Replies
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    I am sure it has been discussed, but can you give...

    I am sure it has been discussed, but can you give some hints on the wiring and connectors.
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    Stock lt1 software limit is 46 degrees. I have no...

    Stock lt1 software limit is 46 degrees. I have no idea if it is software limitation or hardware opti limitation. Someone have to guinea pig the setting to 52* and see if the pcm freaks out.
    It is...
  3. I doubt the injector offsets can bring blms to...

    I doubt the injector offsets can bring blms to 160.
    It is either the tune or the inj flow rate, unless there isn`t any mechanical failure.
    You are running extremely lean but have to find is it...
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    Untuned individual trims for lt1 is number reason...

    Untuned individual trims for lt1 is number reason for crap running engine at light load. At idle they are relative easy to dial but off idle is totally different thing. Untill the airflow equalize at...
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    Injectors are also wired on the 15amp fuses. The...

    Injectors are also wired on the 15amp fuses. The thirstier coils are the d585. Gm doesn`t recommend changing the gap on iridiums on ls1 engines. I am not sure but they are set at 0.040'' and must not...
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    For fuel economy thera are 3 parameters that are...

    For fuel economy thera are 3 parameters that are related, pulse width, rpm and mph. PW and rpm must be as low as possible and mph as high as possible.
    We are still missing that INS.Fuel .Economy in...
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    Change the airbag module. If the airbags were...

    Change the airbag module. If the airbags were deployed the error is hard coded and can`t be cleared.
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    Blackbox and 0411 pcm runs the same processors...

    Blackbox and 0411 pcm runs the same processors and use almost identical strategies in spark and fuel calculations. So the only difference will be coil on plug and fine tunning with the later code....
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    I suggest a b+ coil feed wire upgrade with the...

    I suggest a b+ coil feed wire upgrade with the LTCC.
    The factory wiring of the coils have 2 separate circuits bank to bank each running 15amp fuse with 0.8 wires. That will be the minimum and going...
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    After some down time I managed to merge the 2...

    After some down time I managed to merge the 2 versions of the source code. I added the checksum improvements you have suggested.

    Ported most of the function in a key shortcut. There is a side...
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    Since the LTCC fires immediately after it gets...

    Since the LTCC fires immediately after it gets low on ESC line, there shouldn`t be any spark advance error. The ICM module should also have some delay so if these 2 match, we will have dead spot on...
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    I am thinking of adding that table, since it...

    I am thinking of adding that table, since it doesn`t exist yet.

    There is only built in 16bit scalar at $12048.
    It works like this. the scalar must be converted to ms. In stock case that is...
  13. Thread: 1997 F-Body ECM

    by kur4o
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    That`s the part that I have missed for a long...

    That`s the part that I have missed for a long time. Now it is all clear. It also corresponds with what`s already known as a scalars for low res signals. The tpu cycles each 0.015234ms which equals to...
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    No offense taken. In the path for perfection I...

    No offense taken. In the path for perfection I might have overthought some of the concepts.
    I aim for dead spot on spark only because spark scatter is the main source for bad running engine. Even 2...
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    The hardest part will be to confirm that actual...

    The hardest part will be to confirm that actual spark matches commanded spark by the pcm. Some timing light and crankshaft pulley marking will be needed.
    Another viable test will be to run in...
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    I see some good progress here. Since I haven`t...

    I see some good progress here.

    Since I haven`t got deep enough in the code I was wondering can we benefit from tuning out some of the stock dwell settings in the PCM. Like zeroing the dwell...
  17. Thread: 1997 F-Body ECM

    by kur4o
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    I wonder how I didn`t come up earlier with this....

    I wonder how I didn`t come up earlier with this.

    The knock sensor should be considered audio device/ microphone. The knock filter can actually be a low pass filter, and the philips chip some kind...
  18. Thread: 1997 F-Body ECM

    by kur4o
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    9,553

    The op am you are suspecting is a Philips made,...

    The op am you are suspecting is a Philips made, and in someway is a really important chip. It appears on any pcm board I have look at till 2007 but have different p/n.
    Only on 94-95 is 14 pin and is...
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    In an effort to fine tune the controller I will...

    In an effort to fine tune the controller I will try to hack the GMs ignition controller used on numerous, different PCMs.

    The ignition controller is found on v6 fwd pcms,early ls1 pcms and 512kb...
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    The main obstacle will be that the pcm doesn`t...

    The main obstacle will be that the pcm doesn`t know on which gear the trans is, and there is no way to get it. Patching that will be really too much work with no clear results.

    I just got the idea...
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    The boiling point lowers with lower atmospheric...

    The boiling point lowers with lower atmospheric pressure. The only example I can think of is that you can`t boil eggs on a airplane`s high altitude since the water boils at much lower that 100*C...
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    The chips need some spacer underneath to make...

    The chips need some spacer underneath to make proper contact. Rule of thumb is they must be flush with upper edge of the socket. I suspect there is no good contact between chip and socket.
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    Nice ideas Steveo. The best improvement will...

    Nice ideas Steveo.

    The best improvement will be to keep the flash routine indefinite in the pcm and continue from there with new aldl cable and PC in case some of these fail midflash.

    For a...
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    On the right and left side disconnect all AIR...

    On the right and left side disconnect all AIR pipes that comes out from the exhaust header and plug the holes on the header. It is very likely the air is sucked from there.
    It could also comes...
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    I scored a stock bin for you. It is also set for...

    I scored a stock bin for you. It is also set for manual now. Check your gears, this one is for 2.73 final ratio.

    The checkbox is located in the automitic transmission tab in eextra
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