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Type: Posts; User: kur4o

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    Some more dwell food to digest, while...

    Some more dwell food to digest, while contemplating on a new fire extinguisher system.
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    ONe of the main routine[IRQ} on eside is...

    ONe of the main routine[IRQ} on eside is triggered on each opti low res pulse, It doesn`t run without an active low res signal. That is still an assumption but it buggs the processor really hard. All...
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    In 2014 Gm introduced new Pcm with the Direct...

    In 2014 Gm introduced new Pcm with the Direct injection v8s. The ingition drivers might also get an upgrade and the need of new coils. I saw some interesting tables labelled multi pulse spark dwell....
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    http://www.gearhead-efi.com/Fuel-Injection/attachm...

    http://www.gearhead-efi.com/Fuel-Injection/attachment.php?attachmentid=13067&d=1529720855

    A printout of 2015 truck calibration data. Search for dwell.

    I hope the coils you have are the same...
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    SOme coil reference by years. The one you have...

    SOme coil reference by years.

    The one you have are not available in the catalog, I could only find that they interchange with 12621750. So you got one of newest designs. I will try to dig out a...
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    To get any info from eside the engine must be not...

    To get any info from eside the engine must be not running. That includes the maf bit itself. The eside gets pretty busy when runnig the engine and ignores any aldl requests.
    A single connect before...
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    https://www.eevblog.com/forum/projects/gm-ls-ignit...

    https://www.eevblog.com/forum/projects/gm-ls-ignition-coil-driver-cct/

    Some interesting reading.

    I will try to gather a list of all available coils through the years and link them to pcm they...
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    I have one cable[ I made 1 cable from 2 with...

    I have one cable[ I made 1 cable from 2 with different failures,soldering sucks] that always gives some errors during flashing, but the auto speed reduction helps for successful flash. A checkbox for...
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    Here are some screenshot with lower display...

    Here are some screenshot with lower display resolution. ON high res displays it is much better sized and readable.
    The main buttons does look a bit oversized, compared with dashboard part, maybe a...
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    doublepost

    doublepost
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    That 94-95scan program is not configured for...

    That 94-95scan program is not configured for y-bodies at all. It tries to silence the f4 device, which is the pcm. On y-body the bus master is the CCM device with f1 id.

    I think the aldl is...
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    I have noticed similar spikes in logs at random...

    I have noticed similar spikes in logs at random rate, and I was almost sure it was an error in spi communication between e and t side, due to some of the patches I had over that bus. Now that guy...
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    The next step is to upload some logs, and get...

    The next step is to upload some logs, and get familiar with eehack control window, so you can do some real troublshooting of the car.
    From here any suggestion without a log will be shooting in the...
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    That might be the culprit of the weak spark you...

    That might be the culprit of the weak spark you had recently. The energy of the ls1 coils is too much for the platinum disks to handle on these plugs and the spark scatters taking the least...
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    I went through the code and there is 1 pulse on...

    I went through the code and there is 1 pulse on first opti event, and there is 1 more on the second opti event. All pulses are corrected with baro reading. Than it starts to calculate fuel based on...
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    The lack of power suggest a massive air leak...

    The lack of power suggest a massive air leak before the exhaust. If it was an exhaust leak, it will still run fine, fat rich. Probably 1 cylinder runing extremely lean[drawing unmetered air] with...
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    I see the maf reads a liitle too high for hot...

    I see the maf reads a liitle too high for hot idle. It might be fouled leading the engine to run richer than needed. That`s why the pcm is pulling fuel.
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    Some simple test to do. 1.Disconnect 02 wires...

    Some simple test to do.

    1.Disconnect 02 wires and have a test drive.
    2.Disconnect maf sensor and have a drive test


    A log made with eehack will really ease the investigation of the problem....
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    I really feel sorry for this guy. His mechanic is...

    I really feel sorry for this guy. His mechanic is best at swapping good parts but not that good with diagnostics.

    SInce there is a missing cylinder[ or random missing opti], that might be the...
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    bosch sensors explain the odd readings you have,...

    bosch sensors explain the odd readings you have, even new they are garbage and can`t switch fast enough for the superior GM pcms.
    Get a delco ones and for the sake of money savings, don`t buy...
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    Take a look at this stock log from vette...

    Take a look at this stock log from vette calibration. The 02s are constantly running from 100-150 to 850-900 mv. Yours are barely moving from 300-650
    ...
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    The MAF reads really low on the Wot pulls. It...

    The MAF reads really low on the Wot pulls. It might be not accurate enough on high airflow, fouling the pcm that less air is entering the engine, which results to less fuel than needed.

    Try...
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    With the blm locker the blm and INt must read 128...

    With the blm locker the blm and INt must read 128 in any PE event. If it reads something else the locker might not be applied properly.
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    It looks like the 02s you have are dead shot. Not...

    It looks like the 02s you have are dead shot. Not swinging enough in either direction. They can crack from moisture but yours are completely dead, if something else is not going on.

    Get a good...
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    I should say you are running really lean on...

    I should say you are running really lean on startup.
    Don`t forget you are spraying cold fuel straight in the cylinder, There is not enough time to evaporate and it should be extra rich to run...
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