No spark while cranking - Evo 9 base map

[autolove]

Hello,

I'm attempting first startup and having an issue where although the ignition test is successful, spark seems to be cut while cranking (tested with a grounded spark plug and one of the ignition probes). I'm using the Mitsubishi EVO 7 - 9 trigger mode and haven't modified anything under trigger configurations. While cranking there's a signal on trigger sensor 2 but not 1 and the engine speed data stays at 0. I'm not sure if that's normal with the EVO 7 - 9 trigger mode.

I'm attaching the log from a startup attempt along with the map and would appreciate any insight. Many thanks.

startup-attempt-1.llgx startup-Mitsubishi-EVO-9 PCB V1.6+ G4X Xtreme Plugin.pclx

[Adamw]

Can you do a triggerscope while cranking.  This video is using a G4+ so your screen will look a little different but it is much the same procedure: https://1drv.ms/v/s!AiYbYlZQuRHPmidU5V2CmTcv6t2y?e=PwhlwU

 

[autolove]

@Adamw Thanks for the helpful video. I'll do the trigger scope and report back with the log.

[autolove]

@Adamw Trigger scope log attached. Done while cranking.

TriggerScopeLog-startup-evo9-g4x.llgx

[Adamw]

That triggerscope shows nothing.  Are you sure you clicked capture while the engine is turning?

[autolove]

@Adamw  I hit capture before starting the crank on that one. Sorry about that. Did another and definitely hit capture while cranking this time. Log attached along with a screenshot of the post capture screen. The log still doesn't seem to show much but i'm hoping you could make something of it.

Another worthwhile point is that I installed a brand new crank position sensor today to be on the safe side and rule that out. The old sensor had been though a timing belt snap and could have been damaged because of where it's mounted. I'm experiencing the same issue with the new sensor.

Verifying timing with a timing light also doesn't work because there's no spark while cranking. Interestingly enough, even though some level of spark is occurring during the ignition test, the timing light doesn't flash while connected during the ignition test.

 

evo9-cranking-trigger-scope.llgx

[Adamw]

Your scope shows no signal at all from the crank sensor, cam sensor is working ok.  Possibly the wiring is damaged near the sensor?

[autolove]

@Adamw Tested the adapter to the sensor off the wiring harness and it's supplying good voltage. The sensor itself is brand new. Could something in the evo 9 base map trigger setup be off?

Attached a couple grabs of the trigger configs.

 

[Adamw]

Your ecu setting are fine, and the fact the trigger 1 signal in the triggerscope shows near zero volts means the trigger signal is shorted to ground somewhere.  If a wire was broken, had a bad connection or the sensor was unplugged the the triggerscope would show near 5V as it is pulled-up by the ecu.  

S start by unplugging the crank sensor, do another triggerscope, if the triggerscope still shows 0.2-0.4V like your pic above then the short is somewhere in the engine loom.  If the triggerscope shows 4-5V with the sensor unplugged then that means the short is after the plug.

[autolove]

@Adamw Unplugged the crank sensor and did another trigger scope. Trigger 1 looks to be just a little under 3.7V. Log and screenshot attached. 

In the short after the plug scenario is that referring to the crank sensor plug?

Thanks again.

TriggerScopeLog-startup-2-evo9-g4x.llgx

[Adamw]

Yeah that suggest either the sensor is dead/not working correctly, or there is a short in the wiring between the sensor and its plug, or possibly the sensor doesnt have 12V.

Start by confirming there is 12V on pin 3:

Pin 1 is ground, pin 2 is signal.

[autolove]

@Adamw I checked pin 3 of the male plug from the engine harness that plugs into the sensor and it's providing 11.92V which is about where my battery is at the moment.

It's hard to imagine the wiring of this brand new sensor being bad. This is a tricky one.

[autolove]

@Adamw My thought now is that with both the old and new sensor I didn't install them correctly. I'll verify that and report back.

[autolove]

@Adamw This'll give you a good laugh hopefully. I had the crank sensor installed backwards. Sorted that out and it fired up on the first try without issues. Thanks again for the help debugging.