Starion tacho with EVO III ignitor

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niss720
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Starion tacho with EVO III ignitor

Post by niss720 »

I've had my MPI setup running for about three months now and have finally tried to get my tacho working.

I'm using evo 3 coilpacks, EMS Stinger V3 and am getting the tach feed directly from the ignitor. All the wires have been in place but not connected to the dash.

I have tried to modify the Tach as Prozac suggested recently by jumping a the resistor on the tach module and had no luck :x
Suggested thread can be found here: http://forums.austarion.com/viewtopic.php?t=14013

I then tried the tach mod suggested on Project Zero G including removing the resistor altogether and replacing it with another resistor and diode, but again no result :roll:

Can anyone please help me to understand why it's not working for me? I tried putting in a 6.8k pull up resistor but it still doesn't want to work for me


Here's some pics for reference
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Parting Blue JA Starion

Mercedes W126 420sel
Blue JA Starion (parting)
Silver JA Starion, 45000kms, coilovers
4G63 VR4 cordia
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niss720
Mine is bigger than yours
Posts: 277
Joined: Sun Apr 10, 2011 1:26 am
Location: Adelaide

Post by niss720 »

Nearly forgot the other issue I have is the factory boost gauge doesn't work, this doesn't bother me so much as I have a Auto meter gauge as well. I have considered putting the Auto meter gauge in the factory position but I'm trying to make the car look clean and standard.

I assume the boost gauge receives the siginal from the ECU hence why mine wouldn't work but is There a way I can wire it straight to the sender, or to an aftermarket sender?

Thanks again
Parting Blue JA Starion

Mercedes W126 420sel
Blue JA Starion (parting)
Silver JA Starion, 45000kms, coilovers
4G63 VR4 cordia
popup
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Post by popup »

I think the boost gauge gets its signal direct from the stock MAP sensor mounted on the firewall
1986 UK 2 litre intercooled narrow body
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niss720
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Joined: Sun Apr 10, 2011 1:26 am
Location: Adelaide

Post by niss720 »

New morning brings on a fresh mind, went over all my connections this morning and found my pull up resistor wasn't connected propperly, fixed a solder and it works a charm.

For anyone else who has this issue it is wired straight from the tach output on the ignitor to the starion dash loom. I have done as Zac suggested and jumped the first resistor and added a pull up resistor and it works a charm :pimp

Now just the issue with the MAP sensor. I kept it in the car for the soul reason of powering my stock boost guage but it doesn't work. I bought the car with a blown motor and built the MPI motor so I have no idea if it worked before the swap.
I have wired the red and black wires directly to 12v and the guage moves up on ignition but only between -1 and -0.5 bar and isn't affected by engine vacuume / boost

Thanks again :beer
Parting Blue JA Starion

Mercedes W126 420sel
Blue JA Starion (parting)
Silver JA Starion, 45000kms, coilovers
4G63 VR4 cordia
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