My Tach Dont Work!!!!!!!!!!!!!!

ive got an electromotive TEC 2 eng mgt. how do i get the tach to work. or just get an aftermarket? thanks

Instead of making new threads for different issues about your car, why not post it all in one thread? As for your tach issue, find your tach output on the TEC2 and splice it into the tach input of the S12 chassis harness. I don't know which wire is the tach input(I need to find that out also to get my tach to work). Browse through the s12 FSM to find it. I'll probably do the same when the time comes.

mod_mastazInstead of making new threads for different issues about your car, why not post it all in one thread? As for your tach issue, find your tach output on the TEC2 and splice it into the tach input of the S12 chassis harness. I don't know which wire is the tach input(I need to find that out also to get my tach to work). Browse through the s12 FSM to find it. I'll probably do the same when the time comes.

Generally aftermarket ECU's don't have a strong enough tach signal. You can try to use a 500k pull up resistor buy soldering a 12v supply to one end of the resistor and splicing that into the green wire also along with the tach output from the ecu, if that doesnt work, go the aftermarket tacho....I know that my aftermarket ecu tach output sucks even with the pull up resistor.....

ListerGenerally aftermarket ECU's don't have a strong enough tach signal. You can try to use a 500k pull up resistor buy soldering a 12v supply to one end of the resistor and splicing that into the green wire also along with the tach output from the ecu, if that doesnt work, go the aftermarket tacho....I know that my aftermarket ecu tach output sucks even with the pull up resistor.....

I would like to revive this thread because I know own the car and the tach still doesn't work and I have no ideas where to start.

Might as well go with an aftermarket aftermarket tach.  Also I'd get an fsm

Yeah I was leaning towards aftermarket I just hate how the factory one doesn't work, I have a factory FSM.

Fuck it man remove the stock gauge cluster. Sell it on here for a bit of xtra Cash. Then make your own cluster with your own gauges.

I would like to sell to sell the stock cluster and get a digital one seeing as how the stock cluster is already out of the car and has been replaced with a N/A cluster i hooked up a aftermarket tach just to see if it worked and it does work so i think i just need the wiring diagram for the stock tach, i have a FSM but it is for a 200sx s13.

Check eBay for one also theres downloadable ones here somewhere

And here is the incredible way to get you stock tachometer to work after  installing the MSD 6A CDI Unit with this Transistor upgrade. I worked a couple of hours on how to get the tach to work. The good news is you don't need to purchase and adapters. So this will require you to keep the orginal high voltage coil. Now all that is required is to wire up the transistor, MSD 6A box, and the stock high voltage coil as follows. Now these wiring instructions are for My 1987 Nissan 200SX VG30E wiring. Yours might be a little different wiring colors. So anyhow here is what is needed,

Connect the wiring as follows,
1. Black wire from Body ground to Transistor Emitter
2. Blue wire from the 2.2K ohm resistor(ECU pin 3) to Blue wire of Transistor Collector and Ignition Coil
3. Blue wire from the ECU pin # 5 to white/black wire of Transistor Base
4. Black/white wire from Ignition Switch (12 VDC) to other terminal of the Ignition Coil. 

The trick here is that the Black /white wire carries the 12 volts that is added to the output of of the ECU pin 3 ultimately.  By adding the 12 volt to the signal from ECU pin 3 helps pull up the signal voltage which is required by the Tachometer. When I installed the MSD 6A I didn't connect the Black/White wire and thus the Tach didn't work. Of course MSD said you need to purchase the Tach Adapter at around 50 bucks. So I was determined to find a way to get the Tach working without buying the Adapter. Also I almost forgot to tell you you need to Silcone the High Voltage Coil output so you not grounding the Coil out. I'm going to buy a inductor (coil) tomorrow and see if that will work instead of the High Voltage Coil so I can get rid of the High Voltage coil all toghether. Also I'll try to draw up a schematic tomorrow and post it. Hope everyone can understand this and enjoy you Tach again.