Swapping DME's and DME relays did not make any change, so can be ruled out.
Next onto the list are CHT, IAT, rpm and reference sensors. Static test's all checked out.
CHT
IAT
rpm (speed)
reference
Then, I tried to use my
toy oscilloscope for starters, to get the signal generated by reference and speed sensors, and this is where things got interesting:
speed sensor data
ref sensor data
According to this result, signal is way too weak, both generating 0.4-0.5V peak to peak, instead of 2.0V for ref and 2.5V for speed sensors.
I guess my next step is to acquire a more trustworthy scope to verify the results for flywheel sensors. If confirmed, the main suspect is obvious.
Has anyone faced similar sensor data? Would this cause the symptoms my car is experiencing?