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Author Topic: Diesel's tacho ...  (Read 1558 times)

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Andy B

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Diesel's tacho ...
« on: 25 August 2009, 09:40:56 »
 .... where do they get their signal from? Specifically a DTi Vectra (not the current shape). A mate has a problem with his, the EML is on, but he's now no tacho either. He's having the code read today ..... we were just curious.  :-/
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Kevin Wood

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Re: Diesel's tacho ...
« Reply #1 on: 25 August 2009, 09:45:52 »
Later diseasels have a crank sensor and output on the ECU just like petrol cars.

I have seen earlier mechanical diesels with an output on the alternator to drive the tacho.

Kevin
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Andy B

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Re: Diesel's tacho ...
« Reply #2 on: 25 August 2009, 10:08:28 »
Quote
Later diseasels have a crank sensor and output on the ECU just like petrol cars.

I have seen earlier mechanical diesels with an output on the alternator to drive the tacho.

Kevin

Mmm? My 1.7 low blow TD has a crank sensor, so I would think the later DTi has one too. The car is running but rough, so I would think it's something other than the crank sensor .... wait till the code reader gives its verdict.  :y
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Kevin Wood

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Re: Diesel's tacho ...
« Reply #3 on: 25 August 2009, 10:15:28 »
If it's got a mechanical pump it will run without a crank sensor working but the ECU has no RPM input, so it won't be great...

Kevin
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