bmw e30 tacho

[gabriel]

Hi I have a problem with running my stock e30 tacho

I have tried with these 2 diagrams but both don't do anything to my tacho





I used a 10k resistor to connect to the 12v

and i used my ms to motronic converter to connect the tacho to the megaqsuirt (motronic pin 6) (looked it up in a stock e30 wiring diagram)

And i used IAC1A for the tach out of the megasquirt

[hassmaschine]

in all of my E30 builds I use JS11 jumpered to one of the extra pins on the DB37 (spr 1-4 usually), and simply enable the tach output. No circuit required. But I've heard of euro clusters not working that way (which doesn't really make sense as they all use the same ECU's).

but it could be worth a try.

[gabriel]

in all of my E30 builds I use JS11 jumpered to one of the extra pins on the DB37 (spr 1-4 usually), and simply enable the tach output. No circuit required. But I've heard of euro clusters not working that way (which doesn't really make sense as they all use the same ECU's).

but it could be worth a try.

Thanks i'll try this tommorow

[nitrousdave]

On my car I had to use a small relay to simulate the signal from the stock coil, but then again i am using LS2 coils on mine.

[hassmaschine]

E30s (with the exception of possibly the earlier ones with true distributors) do not trigger the tach off the coil. it's a logic level signal from the ECU.

[moshik99]

hi
i am new here
my car is 316 (1.8 carb) 1987

i have clock in the instrument cluster (in the tachometer place)
and i want to replace it with tachometer
i have a 7k tach from 318I e30
can this tach connect directly to the coil(-)?
my car has no ecu
thx for helping me

[jjt]

Hi,

I have a problem with my e30 tacho, it works, but for some reason shows about 15% less rpm than the engine actually revs, also the tachometer needle wanders about 200rpm all the time. The car has a tacho from 6cyl engine, previously I had m50b25 engine with stock ECU and the tacho worked fine.

I've taken the tacho output from JS11 on the ms3 board.

[jjt]

Hi,

I have a problem with my e30 tacho, it works, but for some reason shows about 15% less rpm than the engine actually revs, also the tachometer needle wanders about 200rpm all the time. The car has a tacho from 6cyl engine, previously I had m50b25 engine with stock ECU and the tacho worked fine.

I've taken the tacho output from JS11 on the ms3 board.

Nevermind

Tacho works now, the batteries on e30 dash were low.

[r1gooo]

Hi everyone!
I've own an e21 /6 MS v2.2 with 3 dual ignition coils and wasted spark.
My problem is that the tacometer is like "divided by 3".

Inside the MS there are 3 connectors welded between itselves, but besides thats is not working properly.

I dont know if that post would fix my problems.

Any ideas?

Thanks so much!

[grom_e30]

is your tacho meant to be driven off a coil negative? what settings are you using can you post a msq?

[r1gooo]

Im running my stock tach, but what you mean with that?
What sort of info do you need? i got it connected direct from the DB connector signal output.

[grom_e30]

are you using any tacho output settings I'm the ecu? Maybe get some picks up of how it looks inside the ms.

[r1gooo]

Yeah, i will be taking some pics to share with all of you guys.
First let me search in my laptop, im just quite lazy those days, i down wont to disassemble all the dashboard

[BMWE30MS2]

Hi I have a bmw 320i euro running 3 coil packs and wasted spark how can I get my tach to work my engine originally had a distributor and a single coil how can I get the ms2 to send a tach signal?