Thread: OBD2 data logger/black box device...

So follow up to this, got the data logging function on an app called Forscan Lite (basically a US car with CANBus type systems specific app) and using a MX+ version of the datalogger above. Very interesting in preliminary testing, haven't been able to get the thing to fault and go into limp mode on me but it looks like the pressure control valve is the likely cause of my vehicles issue. Seems the valve isn't opening quickly enough to drop the pressure out of the fuel rail when it goes off throttle - meaning exactly as the demanded pressure drops and the injectors on the common rail stop firing at full rate, the valve is not opening to dump the pressure out of the common rail so the common rail pressure is shooting for the moon... Interesting, just need the thing to fault to confirm what is happening at the time.

I'm impressed with the OBDLink MX+ though (I ordered one the same morning that the gentleman above offered me a loan of his - bugger), it does everything it says on the label.