Setting Crank Trigger (CKP)

[mpgmike]

I went over things so many times... I see Hall Cam Trigger 1 Primary and Cam Trigger 2 Secondary, but nothing for Hall Crank Trigger specifically. I went through the Set-Ups in TunerStudio, couldn't find it. I set CKP as Cam Primary, and CMS as Cam Secondary. Initially I got an RPM reading that looked reasonable. I didn't have the UAEFI actually controlling anything yet. Trying to set the Offset for ignition, I've been using an LED triggered by the 5 volt signal output for each coil. I want to know specifically, what is the CKP input, where do I set it up; and what specifically is the CMS input? Using the LED I can't even find my timing mark.

[AndreyB]

https://github.com/rusefi/rusefi/wiki/rusEFI-Quick-Start-PDF#make-it-yours

https://github.com/rusefi/rusefi/wiki/rusEFI-Quick-Start-PDF#log-it

[mpgmike]

I ran it for a couple of seconds at idle. Tried to upload it and got this message:

"ERROR
Invalid file extension: Log1.mlg"

First I tried the Drag & Drop, then used the "Add files" button under Attachments.

[mpgmike]

I have CKP going into C5, CAM1 and CMS to C6, CAM2. I had C5 as Cam Primary and C6 as Secondary. I was getting 71 RPM at idle. I reversed them in the Set-Up and am now getting reasonable RPM readings. Also, I'm getting a consistent blinking of the LED tied to Coil 1 Output.

[AndreyB]

First I tried the Drag & Drop, then used the "Add files" button under Attachments.

Wrong page? https://github.com/rusefi/rusefi/wiki/rusEFI-Quick-Start-PDF#share-it is not forum attachements

https://github.com/rusefi/rusefi/wiki/Discord could be a better option for faster help

[mpgmike]

Thank you again. I got the Set-Up figured out. I had to drag my GOOD scope out to the garage, as my cheaper one freaked out from the EMI coming off the engine bay. Nevertheless, I was able to rig up a coil to verify Ignition Timing Offset with my timing light. Next, I compared when the UAEFI was firing coil 1 to when the distributor was firing #1. Initially they were 180 out, but flipping Cam Sensor Primary from Falling to Rising brought them in sync. Thanks for the guidance. Time to move on to the next step.

[mpgmike]

I'm waiting on ignition parts, including the wires I want to use (ordered them August 15). Made up 1 test wire, swapped it around making sure the engine still ran the same. Idle timing is the same as stock, 2 DBTDC. It's as far as I can take it until I get my wires.

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[mpgmike]

I hate to start yet another thread, so I'm adding to this one. I changed to Single Coil Coil#1 in the settings awhile ago and had the engine idling better than stock. Laptop battery hit critically low, disconnected from the UAEFI, then shut down. I hadn't burned the latest settings. Since then I can't get it to start. I verified:
- CPS
- CMS
- MAP
- TPS
- Battery voltage to rusEFI & ignition coil
- Grounds to rusEFI & ignition coil

I don't get any output from Coil #1 (B15) while cranking, but as soon as I let off the key I get 3 quick pulses. I'm monitoring that with an LED jumpered to B15. I don't know if the attached is of any help.

ZJ_1Coil.zip

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[mpgmike]

Got a good night's sleep and with a fresh mind, checked connections in my custom LS harness. I found I have Signal Return on cylinders 4-6 but not 1-3. Pulled the harness apart and discovered I never soldered that wire. This was two 4-cylinder harnesses spliced together to make a single 6-cylinder harness. Disconnected the factory coil, plugged the rusEFI back in, connected my LS coil and... IT FIRED RIGHT UP!

Now I have to wonder how the bleep it ran yesterday with no Signal Return!?! Time to have fun again.

[AndreyB]

Now I have to wonder how the bleep it ran yesterday with no Signal Return!?! Time to have fun again.

Most engines would somewhat run on half cylinders

[mpgmike]

I'm beginning to think I may have a defective unit, or maybe I did something to kill it. Sitting at idle, fiddling with the Timing Table it suddenly shut off; like I turned the key off. Frustrated, I swapped coil wires to the factory, and reconnected it. Now it runs on the stock ECU. Checked for spark from the LS coil, nothing. Checked for logic signals at the coil connector, nothing. Disconnected the harness and checked for logic signals at B15, nothing. Yet everything else checks out just fine. I'm using a bright white LED with a 220 ohm current limiting resistor to do these checks so I don't have to tote my scope out to the shop. Any ideas what direction to take? I no longer believe it's a Configuration Setting, but a hardware issue.

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[mpgmike]

Switched from Single Coil ignition output to Individual Coils. I checked for signal at all 6 coil outputs. I have output for coils 2-6, but not 1 (B15). Checked: 30 ohms B15 to power ground, around 1k ohms to Signal Return. All of the other coil outputs show >20k ohms to ground/Signal Return.

[mpgmike]

I tracked the connectivity to ground to U103, SN74LVC4245APWR A8 (pin 10). The data sheet claims outputs are tri-state. All Bx pins are in tri-state and A1-A7 are in tri-state, but A8 which feeds OUT_IGN1 is in ground state. I should probably order one and see if that restores IGN1_OUT on B15. Is this common? Did I possibly do something to cause it?

[AndreyB]

I agree we all your conclusions so far, I cannot explain this issue. I do not recall similar incidents but please double check discord

[AndreyB]

There is https://github.com/andreika-git/hellen-one/issues/378

[mpgmike]

Just ordered 5, in case I mess 1 up I have spares.

[mpgmike]

Thanks AndreB. I had already placed the order before seeing your reply. Still, I didn't see any resolution in that discussion you linked. I may get the MOSFETs for Ignition Output, use a 1k pull-up on the Drains to 5 volts, and invert the output from the rusEFI (if this happens again).

[mpgmike]

Since this is open source, and you have expressed that you are open to suggestions for improvements, I had a failure with U103, SN74LVC4245APWR Logic Level Translator used as a Gate Driver for Ignition Output channels. It appears it is rated for 50 mA current. As a suggestion, swap in a P-MOSFET array like the Toshiba TBD62783AFNG. It is an 8-channel P-MOSFET array, 18 pins, available in P-DIP, SOP, SSOP, and P-SOP packages. It is capable of 500 mA current. Since it isn't tri-state capable, it would need pull-down resistors added. I would suggest 1k to 2.2k. Here is a link to DigiKey's data sheet:

https://toshiba.semicon-storage.com/info/TBD62783AFG_datasheet_en_20160511.pdf?did=30523&prodName=TBD62783AFG

I see you using ST, Microchip, TI, and other components. If you don't want to use the Toshiba version, many other companies make theirs, so you have options.

[AndreyB]

I've linked your suggestion to the ticket above. But before we fix we have to confirm the issue, what's your understanding of the sequence of events? Is that some specific igniter that's demanding above 50a? Is there anything you can measure or maybe even reproduce on one of the not-yet-damaged channels?

[mpgmike]

The link you posted where this part had failed in the past, it was brought up that it was only capable of 50 mA. Coil Outputs 2-6 are still working. I used them to compare to #1 -- what is different? I then traced it backwards until I landed on the logic converter pin 10. My suggestion is merely to increase the amp rating on the gate driver 5 volt output.

I haven't measured the current draw on the LS coil's Signal input, so I don't know if 50 mA is dangerously close, or if it was just a fluke failure.

[mpgmike]

Parts arrived today. Got the old one removed and the new one installed.

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Haven't had a chance to test it, as today I swapped the older intake manifold for the newer style (more than meets the eye).

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[mpgmike]

Just verified output on all 6 coil drivers. This confirms a successful diagnosis and a successful repair.

[mpgmike]

The logic level translator went out again. Sent AndreyB an LS coil to play with. Meanwhile, I got sloppy the 2nd time removing the chip. The Dremel cut into 3 other parts. I know one is a 4.7k X4 resistor array, but I don't know what the other 2 are. I can't even order replacements until I know what is needed.

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[AndreyB]

https://github.com/rusefi/rusefi/wiki/uaEFI now has links to https://rusefi.com/docs/ibom/uaefi-d-ibom.html and https://rusefi.com/docs/ibom/uaefi-a-ibom.html

[mpgmike]

Thank you kindly.