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Tacho on Deisel?

Tech Talk for Cruiser owners.

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Posts: 88
Joined: Wed Mar 09, 2005 10:39 am

Tacho on Deisel?

Post by the plough »

Where does the tacho gets it reading from on a deisel engine??
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Post by toyotroop »

You will have to tell us what diesel motor it is and what model it is first
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Post by the plough »

thought it was a generic thing!.....oh well
2.8 L series deisel i think 1990.
It works fine some times but seems to drop out until u hit a bump or something then it will work again..progressively gettin worse
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Post by midi73 »

some read from the injector pump & some read from the flywheel. I am not sure where else. these are the 2 places that I have experianced. The problem sounds more like a wiring problem or the tacho itself to me.
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Post by the plough »

it seems to me like a bad connection somewhere
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ToNkA
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Post by ToNkA »

I had the same problem on my 2L Diesel.

The sensor on the back of the fuel pump (between fuel pump and engine block, hardest thing to get to ever!) was stuffed. It slowly stopped working until I had no tacho.

I replaced it with a 2nd hand sensor that I was lucky to score from a Diesel Mechanic for cheap and all was fine again. If it is that sensor then they are hard to find as most want to sell them with the pump 2nd hand.

I have never priced a new one.

Not sure if the 2.8 has the same sensor though???
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Post by r0ck_m0nkey »

midi73 wrote:some read from the injector pump & some read from the flywheel. I am not sure where else. these are the 2 places that I have experianced. The problem sounds more like a wiring problem or the tacho itself to me.
Not sure if any Toyotas do, but another place for diesels is off the alternator.
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Post by the plough »

havnt had a good chance to look at it but i know from memory that there are 3 wires from the injector pump and two are the fuel shut off thingy, so maybe the third wire goes to the tacho...will look this arv
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