Tach Help???

[Shift_Oversteer]

Ok so i've had my sr swap for a while now and my tach hasnt worked since... I bought a "universal" racing tach in the hopes that it would reead the sr's signal but appaerently it doesnt. The guy that did most of the swap for me said that it's because I need a digital/analog adaptor and that it would cost around $80.00... any way around buying the adaptor?

[Datsun]

How many wires are on the back of the universal tach? I bought one of those tach adapters for $80.00. When I got it and read the directions I realized I didn't need it to get my tach working. That fancy adapter does not use the signal from the ECU. Instead you cut the wire supplying 12 volts possitive to the coil packs and connect them both to the adapter. Now all the juice running to the coil packs is now running through the adaptor. Then you use another wire or two coming out of the adaptor to hook up to the tach. So, if the tach you have works the same way mine does (it's an antique) you don't need the adapter. If you are not sure if the tach will work this way, open it up and look inside. Are there two wires going into it that are looped around a little coil inside? If so, it will work.

[Shift_Oversteer]

great, thanks, ill check up on that and possibly post pics later...

[Shift_Oversteer]

**Old post I know** So what Datsun means is I should run the tach signal right to the coil packs?

[UsedToOwn240SX]

Why would your stock tach not work? Wiring issue? DOHC S13 tach should work fine.

[TougeYARO]

hey a****aka, it's U-1. im still in the class right now, what's up man? anything new?

[stumpz]

just get a s-afc2..my dohc tach from teh 91 ka reads about 1 to 2 hundred rpms off and it bugs the piss out of me.