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LLY Ficm
I'm torn on 25 or 26... As I get better with this scope, I'm saying 26 again now... :rolleyes: Captures below, I had the throttle / crank speed set at about 1700R, and exactly 10deg main pulse timing. And we know center to center on crank reluctor teeth equals 6 degrees of Kevin Bacon. So if ya... -
LLY Ficm
Few more late night updates. Working bugs out on the bench rig. Seems we have differences in PIDs used between an 01 - 03 LB7. I grabbed my buddies snapon scanner again to scope injector pulses. And quickly noticed it was able to read "Absolute Fuel Pressure" PID where EFI didn't list that one... -
LLY Ficm
Ah yeah. Capture your Crank and Cam signals for me please. Just want a true blue live version of the LLY so we can set to rest the cam correlation deal for my emulator. Will be easy at the bail connector to find the 2 signal wires... Easy to identify, as crank and cam are both 3 wires Shielded... -
LLY Ficm
Just see if anything like Circuit #'s are changed.. If we have a 12v power supply "PK" or a 5V ref line difference, then it's possible part of the ECM isn't being powered correctly. Which could impact several sensors at same time. But because the values are not being shown in EFIlive, to me it's... -
LLY Ficm
I think it's limp mode cause one or more sensors are out of wack.. Typically on my LMM marine stuff I have it written out. But on a stock build, ya have that limp mode torque limit to around 2000R's. Figure that's what it's seeing.. If I could read those sensor values for MAP and Fuel... -
LLY Ficm
Hey Jason, take note of first paragraph in this DTC definition. While I plan to further explore these statements in detail regarding our J1939 messages and the FICM control during cranking, this line below seems to match up with what I hear. "The FICM uses this replicated signal to generate... -
LLY Ficm
No luck with those missing PIDs. They are also missing in standard OBD-II requests from Troque. MAP shows stuck at 6.6psi value, no BARO or fuel rate data. Don't believe it could be a pinout difference or anything Medium Duty related, as someone would have noted this before now.. However I was... -
LLY Ficm
Some little steel caps in place of the plungers, plus a little Gorilla tape to hold them in place, it replicates the sound, with much less load on the system than in real life. I actually added the Gorrila tape to quiet them down.. With just masking tape, they sounded like an old 7.3L I haven't... -
LLY Ficm
Best I can tell, it's in cranking mode and VATS doesn't kick in until it reaches set idle speed. Reading up on the code, typically a fire and die issue in the vehicle. However in this case, I have control of the Fire side, so can keep it alive under set RPM. This thing will actually start firing... -
LLY Ficm
Been mostly focused on the class 2 data, and why it wouldn't exceed 600. But I did record some data on the J1939 side. As noted several page back, still just the 2 lines of interesting data. And from what I can tell, first ID is trouble codes related to crank signal status, while second ID is... -
LLY Ficm
Made some more progress today on the Kodiak bench setup. Switched the Arduino Emulator to run off 12v power from the chassis harness fuse block. Was having issues with ECM not powering down by switch, when the emulator was being powered from a separate USB supply. Ground loop something was... -
LLY Ficm
Thanks for the vote of confidence. I, for one, enjoy hacking around on old OEM hardware from about any manufacturer. Especially if I don't have to depend on it for a ride to work tomorrow.. While laying all this out takes a lot of time, it's fun just to share in these types of science... -
October '23 Chat -- "Spooky Times"
Now that can be scary... Love the dedication to learning. You will get it tuned. Recall my first go round with LLY injectors, 11yrs ago according to video below, on the OG Dmax boat. I'd bagged all 8 up for about a year, full of B100. The Bio part only came to light when we tried to fire up a...- kidturbo
- Post #12
- Forum: Smoke Signals