Rec counter MP9 conversion

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Rec counter MP9 conversion

Postby dorian.bmw35 » Wed May 11, 2016 6:31 pm

Can you please help me , i change from carb to Mp9 and kept the old wiring with dash, I cannot get the rev counter to work. It used to be connect to the coil on the carb engin.

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Re: Rec counter MP9 conversion

Postby Torker » Wed May 11, 2016 6:46 pm

dorian.bmw35 wrote:Can you please help me , i change from carb to Mp9 and kept the old wiring with dash, I cannot get the rev counter to work. It used to be connect to the coil on the carb engin.


MP9 rev counter shares the signal from the distributor trigger (pin 2) with the ECU. I don't think the 5V signal will be sufficient to drive an older rev counter. One solution would be to ditch the 3-pin coil and fit a normal 2-pin coil with a TP100 module. You will be able to pick up the trigger from there again.
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Re: Rec counter MP9 conversion

Postby PapaJo » Thu May 12, 2016 1:31 am

Torker wrote:
dorian.bmw35 wrote:Can you please help me , i change from carb to Mp9 and kept the old wiring with dash, I cannot get the rev counter to work. It used to be connect to the coil on the carb engin.


MP9 rev counter shares the signal from the distributor trigger (pin 2) with the ECU. I don't think the 5V signal will be sufficient to drive an older rev counter. One solution would be to ditch the 3-pin coil and fit a normal 2-pin coil with a TP100 module. You will be able to pick up the trigger from there again.


:iagree:

Use a 2 pin coil wired to a TP100 and then you can pick up the pulse for the rev counter on pin 7 on the TP100.

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Re: Rec counter MP9 conversion

Postby -=sT3V3=- » Thu May 12, 2016 6:46 am

or...

solder your rev counter wire directly to the 3 pin coil.

Search for it on here, the 3 pin coil basically has a coil driver built in, you just need to hijack one of the 2 wires to the coil bit for rev counter input.

Image

"1" in the picture

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Re: Rec counter MP9 conversion

Postby dorian.bmw35 » Wed May 18, 2016 7:31 am

-=sT3V3=- wrote:or...

solder your rev counter wire directly to the 3 pin coil.

Search for it on here, the 3 pin coil basically has a coil driver built in, you just need to hijack one of the 2 wires to the coil bit for rev counter input.

Image

"1" in the picture
, i cannot open the pic

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Re: Rec counter MP9 conversion

Postby Torker » Wed May 18, 2016 8:08 am

dorian.bmw35 wrote:
-=sT3V3=- wrote:or...

solder your rev counter wire directly to the 3 pin coil.

Search for it on here, the 3 pin coil basically has a coil driver built in, you just need to hijack one of the 2 wires to the coil bit for rev counter input.

Image

"1" in the picture
, i cannot open the pic


Image
Current rides:

VW Golf - 83 GT 2.1 16V 2-door with throttles
VW Golf - 78 LS 2.0 8V 4-door (2.1 ABF with throttles in progress)
VW Golf - '08 Citi Storm - 1.4 for now
Hyundai - 1.4 Getz (daily)

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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 9:50 am

I have a quad module with input signals from Dictator ECU and I battle to get my REV counter on my Polo classic 6n to work. I had to buy a tachometer and connect it with my Dictator ECU just to have some sort of RPM info. Now I'm no expert in wiring ECU's and learn everyday so maybe someone can help me out as well. :lol:

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 10:48 am

What does a quad module look like. Don't know dictator well enough. Surely it only runs in wasted sparkmfashion though so two actualy spark outs from dictator?
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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 11:35 am

Image

Yes there are 2 input signals from the dictator and yes it is wasted spark bud.

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 11:57 am

But hang on your polo should have had a rev counter out from the mp9. Would have been pin9 a green wire.
If you can locate that you should be able to connect it to the dicktator rpm out.
If that does not give you an rpm reading sometimes all it needs a a 2k2 resitor to a 12v line and it works. The mk3 needed that so likely the polo would need the same.
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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 12:10 pm

panic-mechanic wrote:But hang on your polo should have had a rev counter out from the mp9. Would have been pin9 a green wire.
If you can locate that you should be able to connect it to the dicktator rpm out.
If that does not give you an rpm reading sometimes all it needs a a 2k2 resitor to a 12v line and it works. The mk3 needed that so likely the polo would need the same.


Yes sir alles was mp9 and a bud of mine told me I needed a resistor, but never knew exactly what he was talking about.
Where will this green wire be? Still connected to the MP9 ECU plug?

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 12:13 pm

Of course I have no idea where it would be currently but yes likely still connected to the mp9 plug if somebody did not cut it off.
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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 12:27 pm

panic-mechanic wrote:Of course I have no idea where it would be currently but yes likely still connected to the mp9 plug if somebody did not cut it off.


Will have a look as I only disconnected the plug from the MP9 ECU(Sold the ECU) and haven't cut of any wires from the plug. Was looking on mp9 wiring diagrams and on there they show that there is no wire in pin 9. Will let you know if I can locate the wire.

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 12:42 pm

Don't know what document you are using but trust me pin 9 is the rpm out and it's usually green.
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Re: Rec counter MP9 conversion

Postby Torker » Wed May 18, 2016 12:54 pm

panic-mechanic wrote:Don't know what document you are using but trust me pin 9 is the rpm out and it's usually green.


Might be different on various models but when I buzzed out the wiring on my Velo there was no wire on pin 9. I made a plug and play Dicktator harness (basically plugged the Dicktator into the MP9 harness) and the rev counter still worked on the original wiring. As a matter of fact I just finished a plug and play setup for a guy in Namibia this morning and on a Golf the rev counter doesn't get the rpm signal from the ECU. What we found where we installed the Dicktator on top of the original wiring, as soon as you cut the original wire on pin 2 on the dizzy the rev counter stops working (with MP9 plugged out and running on Dicktator). We only use the tacho out to drive the older type rev counters.
Current rides:

VW Golf - 83 GT 2.1 16V 2-door with throttles
VW Golf - 78 LS 2.0 8V 4-door (2.1 ABF with throttles in progress)
VW Golf - '08 Citi Storm - 1.4 for now
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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 1:09 pm

Torker wrote:
panic-mechanic wrote:Don't know what document you are using but trust me pin 9 is the rpm out and it's usually green.


Might be different on various models but when I buzzed out the wiring on my Velo there was no wire on pin 9. I made a plug and play Dicktator harness (basically plugged the Dicktator into the MP9 harness) and the rev counter still worked on the original wiring. As a matter of fact I just finished a plug and play setup for a guy in Namibia this morning and on a Golf the rev counter doesn't get the rpm signal from the ECU. What we found where we installed the Dicktator on top of the original wiring, as soon as you cut the original wire on pin 2 on the dizzy the rev counter stops working (with MP9 plugged out and running on Dicktator). We only use the tacho out to drive the older type rev counters.


The wiring diagram was actually from a velocity so yes it may differ from my mp9 wiring diagram. And really hope I can actually just plug the green wire into my Tacho out if it has the green wire or if I can find it.

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 1:18 pm

On citi it gets the tacho signal from the dissy and then converts it to drive the tacho. So on those basically i would normally put the aftermarket management tacho out into the wire that would normally have come from the hall sender and everything happily works again.
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Re: Rec counter MP9 conversion

Postby Robz » Wed May 18, 2016 1:55 pm

Panic , I would just like to clarify 100% by what you meant with "all it needs a a 2k2 resitor to a 12v line". Between the Dictator ECU tacho out wire and the pin 9 green wire I should add a 2k2 resistor where both wires should connect to each other?

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Wed May 18, 2016 6:16 pm

Firstly connect it just straight and see if it comes alive.
If not then take a 2k2 resistor and join the one end to that line and the other end to a switched 12v + line.
It's called volt up - it raises the signal strength basically.
Stephan van Tonder - Jhb - Putfontein Benoni
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'05 Audi A6 3.0L TDI Avant
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Re: Rec counter MP9 conversion

Postby Robz » Mon May 23, 2016 7:46 am

So I connected the green pin9 wire(There was one) straight the the Tacho out on Dictator and Wualla it works just fine, but then my cluster started making the most terrible beeping noise because of oil pressure sensors not connected. :lol: Still need to get the OEM sensors for my polo and see if it will fit on the AGU's oil filter housing so I can get rid of that beeping. So thank you Panic, really appreciate your help!

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Re: Rec counter MP9 conversion

Postby panic-mechanic » Mon May 23, 2016 8:19 am

No worries.
The sensors all scre into the same thread yes so will fit.
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'05 Audi A6 3.0L TDI Avant
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