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Type: Posts; User: BoulderCharles

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  1. Replies
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    Ah, thanks. I'm less familiar with breaking down...

    Ah, thanks. I'm less familiar with breaking down the bits in this way. Do you know the hexadecimal code for Byte0 to signal 4WD on? And does it span across Byte 0 and Byte 1?

    Also, any chance you...
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    I ended up using the hardwired approach as I...

    I ended up using the hardwired approach as I couldn't find the PIDs and my PSI harness had the TU/TD wiring included in the trans harness. It works fine and there are a few threads talking through...
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    Thanks! Can you clarify the "+0.7" rows? Are...

    Thanks! Can you clarify the "+0.7" rows? Are those additional bytes that need to be sent with the PID $2D1? Or do I just need to send the same signal with <=100ms frequency?
  4. In doing some more research, I do think the...

    In doing some more research, I do think the "Vehicle Speed Hi" is inadvertently turning off the fans above 40mph. I have discrete fans so while the ECM thinks its just slowing down the fan speed...
  5. Question for the experienced tuners here. Does...

    Question for the experienced tuners here. Does the "Vehicle Speed Hi" setting fully turn off the fans above the set speed (which is currently 40mph)? If so, that might explain why it is heating up so...
  6. I have the stock steam vent pipe at the front of...

    I have the stock steam vent pipe at the front of the engine, with the steam hose run to the bottom of the expansion tank.
  7. I was running a stock thermostat up to this point...

    I was running a stock thermostat up to this point (187F, I believe) and didn't notice a difference when I swapped to a cooler thermostat.

    blindsquirrel, what do you see as typical max temps under...
  8. Gotcha. I could put another ECT gauge in the...

    Gotcha. I could put another ECT gauge in the radiator as there is a port there. If the temps are lower elsewhere, that would suggest air trapped in the head, right?
  9. This is engine coolant temperature and I'm...

    This is engine coolant temperature and I'm measuring via CAN-bus PIDs (with a scanner tool and via 0x05 PID for my ECT gauge).
  10. What are normal Gen 4 engine temps when under load?

    I have an LC9 in my Land Rover Discovery 2 (5.3L Gen 4). Around town, I?m at 200-210, even on 95 degree days in stop and go traffic. Going up the shorter, steep mountain roads here in Colorado, I get...
  11. Thanks! I should have thought of that first. I...

    Thanks! I should have thought of that first. I noticed one change was the enablement of "Mountain Mode" so I tried just disabling that but without success. I'll try to just reload an old trans tune...
  12. 6L80e TU/TD: Downshifting twice for a single signal

    Before I get too deep into troubleshooting I want to see if someone has experience with this problem.

    I have hardwired the TU/TD signal to my 6L80e and it worked well for a few months (following...
  13. One thing I realized working on my TU/TD is to...

    One thing I realized working on my TU/TD is to confirm the manual mode in the TCM. So open your VCM Scanner, add Trans Shift Mode and Trans Current Gear, shift into manual mode, and see what comes...
  14. Air Conditioning Pressure Signal Gone Missing

    I am having an issue with the AC pressure signal in my LS swapped vehicle and have run out of ideas to test. I'd love any thoughts you may have:


    I am running an E38 ECM and have added the AC 5V...
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    Need PID for 4 Low Signal (6L80)

    I LS swapped my Land Rover Discovery 2 and one of the remaining items is getting the 4Low to work. I have developed a CANbus gateway so I am able to send/receive CAN messages. It?s an E38 ECM from a...
  16. Sorry, I didn't realize I forgot to close the...

    Sorry, I didn't realize I forgot to close the loop here. My problem was that the machine shop installed the wrong cam timing gear so the cam position sensor wasn't getting a signal.
  17. I am using the Land Rover trinary switch to...

    I am using the Land Rover trinary switch to control for over and under pressure. I?ll keep an eye out for engine load issues. Thanks for the heads up on that.
  18. Thanks. I did find a way to emulate the pressure...

    Thanks. I did find a way to emulate the pressure sensor and get the clutch relay signal to work. Sharing here in case others need this. This worked on my LC9 with an E38 ECM (making the ECM think the...
  19. Can AC run without GM pressure sensor?

    I have an LC9 in my 2004 Land Rover Discovery 2 and am sorting out the AC. The Rover has a pressure sensor that cuts power to the compressor so I was hoping to avoid adding the GM pressure sensor. Is...
  20. After some more diagnosing it looks like my fuel...

    After some more diagnosing it looks like my fuel pump is going bad (it had pressure earlier this week but didn’t have pressure today). The motor does have spark so it should run once I get the fuel...
  21. Thanks again for the response. I am going to give...

    Thanks again for the response. I am going to give PSI a call tomorrow to see what ideas they have. Oddly, after I updated those U codes in the TCM I turned over the motor and got one or two...
  22. Thanks for the quick response. Yes, I did a...

    Thanks for the quick response. Yes, I did a write-entire for the VATS (and again when I loaded the latest tune). I went back through the ECM DTCs and found a few more that likely should have been set...
  23. LS Swap U0100 Issue (LC9 into a Land Rover)

    I need some help with my LS swap. It will crank but not start and I have a U0100 DTC. I'm hoping this is something others have experience with. Here are the current DTCs (I'm not worried about the...
  24. Resource for wiring diagrams: '11 Silverado 5.3L (LC9)

    Does anyone have a wiring diagram for a 2011 Silverado with the LC9 5.3L? Or even just a good pin-out diagram for the E38.

    Thanks in advance and my apologies if this is posted elsewhere (I did a...
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    It’s funnier from the outside, I’m sure!...

    It’s funnier from the outside, I’m sure! Apparently their parts guy was sh*t and has since been replaced. I guess it gives me an excuse to install a new camshaft while I’m in there...
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