1990 maft wiring?

[twistedcm2]

I just wanted to know what wire you can tap into off of the cas on a 1990 to get an rpm signal.

 

[90_Turbo_Clipse]

Does anybody know becuaw my tach doesn't work and i need a place to tap for a external Tach.

 

[Michael Z.]

There's a full write-up in the tech section: http://www.dsmtuners.com/forums/showthread.php?t=240411

 

[blizz99]

bringing this back up because i need to know too and that link doesnt help people with 90 CAS's

 

[droppinbottom]

I may be mistaken here but I think you hook the white wire from your maf-t to the rpm wire on the ecu.

 

[blizz99]

can't you tap into one of the CAS wires like in the 91-94's?

 

[RipperXX]

I also need to know this, as I did tap that white wire into one on the firewall that was after the CAS harness. (didn't want to tap a wire on the CAS harness) but was still the same wire/signal from it.


And thing is I don't think that is supposed to be connected on the 90, but maybe I am wrong?

 

[Sp1kE]

90's get the rpm signal from the coil.
Theres 4 wires on the plug, I forget which one it is, but one of them supplies the rpm to the tach.

 

[RipperXX]

Any idea where I could find instructions to install it on a 90 model?