ref/sync problem in evo 8

[Loqy]

Hi Stevieturbo,

I'll capture more but that's the same graphics

[Loqy]

Hi guys,

I've changed all the sensors with brand new sensors unfortunately my laptop couldn't connect to the M800.
I'm able to connect with the MDC ecu.

Then I realize that usually before turn on the engine that the 'Check Engine' lamp will turn on then in few seconds automatically turn off.

This time the 'Check Engine' lamp turn off.
Is that related to my problem ?

[Holmz]

Hi Stevieturbo,

I'll capture more but that's the same graphics

Do not post more graphics, just post the capture file itself.

[stevieturbo]

https://www.youtube.com/watch?v=mv0-9_JS8oA

Approx 38 minutes

[Scott@FP]

From the pics Loqy posted it looks like a wiring error, those traces match the Evo9 sync and the Evo9 intake cam position. He ain't GOT a ref signal. Ref signal should be 2 tooth (4 pulses per cycle) with about a 65% DC low, sync 1 long tooth one short per cycle, int cam position 4 long (~90%DC low) evenly spaced pulses per cycle.

[Loqy]

Guys,

The problem solved.

I started looked from the 'check engine light off' from M800 plug in ecu wiring diagram.
From OEM pin 22 & 57 I started traced the wiring loom connection while I checked with the multi meter.
I figured out that there was no connection between Relay Box Engine Compartment B19X pin 1 & 2 to C34 Connector pin 13.
Fixed the wiring loom connection & now the engine is working properly.

Thank for all your support guys, I really appreciate it.