Rev Counter Calibration

Post by **wackiki** » 08 May 2010, 21:50

Hi Guys I'm new here so excuse anything i've missed, I think i've looked through everything and still can't find an answer.
I have a 1990 1.9 Transporter, that's mid camper conversion. I just got a dash on ebay with rev counter and a digital clock. The problem is it came from a diesel, I've got every thing to work but the rev counter is barely moving 1000rpm is the engine flat out. I've read that there is a pot under the white sticker on the back for adjusting it. Will this give me enough to make it work on a petrol? or should i be looking somewhere else?
Cheers Karl

Post by **kevtherev** » 08 May 2010, 21:53

what have you connected the tacho to?

Post by **VWCamperfan** » 08 May 2010, 21:55

The rev counter from a diesel engine runs from the alternator not the ignition. Don't know if you realised this but thought I'd mention it just in case!
Welome to the club too!

Post by **wackiki** » 08 May 2010, 21:58

It was a straight swop for the old dash i just had to remove the bit with the glow plug light in and swop it for the same section from my old one. The rev counter is still on it's original circuit foil.

Post by **kevtherev** » 08 May 2010, 22:01

then it's on the wrong circuit

connect it to the alt

Post by **wackiki** » 08 May 2010, 22:04

So if i get this right, either the tacho or the foil is specific to the petrol/diesel.
is it possible then to run a cable from the alternator and run it in to this circuit?

Post by **wackiki** » 08 May 2010, 22:05

sorry missed a bit, where on the alternator?

Post by **VWCamperfan** » 08 May 2010, 22:18

The 'W' connection... If its there!

Post by **wackiki** » 08 May 2010, 22:24

Thanks i'll give that a try, from memory i think it's the green wire.

Post by **wackiki** » 08 May 2010, 22:41

Just thinking does this wire originate in the engine bay?

Post by **VWCamperfan** » 08 May 2010, 22:47

As your alternator is there... Then I imagine it would... Yes...

Post by **wackiki** » 08 May 2010, 22:57

Very Smart. I'm talking about the existing wire, it being petrol. I was hoping i could just move the end in the engine bay to the alternator, hence my question where does it originate?

Post by **kevtherev** » 08 May 2010, 22:58

on the coil usually

but your 1.9 never had a tacho fitted.. so you'll have to run a wire from the alt

Post by **wackiki** » 08 May 2010, 23:01

lovely thanks. That will be much neater than splicing a new cable in.

Post by **kevtherev** » 08 May 2010, 23:04

you will have to. as you haven't got a tacho feed on your coil

Club 80-90 Forums

Rev Counter Calibration

Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration

Re: Rev Counter Calibration