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Alfa 147 2.0TS crank sensor failure? (log inside)

Posted: 14 Nov 2012, 14:06
by ZoLtaR
Hi guys.

The car is Alfa 147 2.0TS. Doesn't start at all. Engine completely died. No spark on plugs. Looks like crank sensor is dead but I have to be pretty sure before replacing it. I took off spark plugs and cranked engine for about 20s. Live data from rpm sensor looks pretty weird. Sensor is seeing rpm's for a moment and then reports 0, than again about 200rpms and then again 0. It might be a dead sensor? I assume it's not normal situation.

Image

and log file
http://ital-performance.pl/temp/alfa_14 ... ailure.csv

Thanks for your help.

Re: Alfa 147 2.0TS crank sensor failure? (log inside)

Posted: 14 Nov 2012, 16:24
by yani
If this is with a VAGCOM interface then the 0 could be caused by communication error (due to low power supply during cranking). So, don't blame the sensor yet.
Any stored errors?

Re: Alfa 147 2.0TS crank sensor failure? (log inside)

Posted: 15 Nov 2012, 08:02
by ZoLtaR
Interface ELM327-USB , no stored errors.

Re: Alfa 147 2.0TS crank sensor failure? (log inside)

Posted: 16 Nov 2012, 15:31
by ZoLtaR
Dead crank sensor. Fitted new one and everything is ok.