How to wire up tachometric relay for fuel pump

**TurboRA28** · 06-08-2009, 03:45 PM

Hi all, I am doing a 1JZ swap into a MX83. I am going to use a tachometric relay for the fuel pump.. I got one from a gas fitter but unsure what the pins are..

I have -

neg coil (easy)
gnd neg (easy)
gas+pos 12v?
lock off + pos gas?

Cheers
Joel

**RA35GT** · 06-08-2009, 03:57 PM

http://www.toymods.net/forums/showth...ht=tachometric

**TurboRA28** · 06-08-2009, 06:57 PM

hmm no good, mine is only 4 pin totally different. its from a lpg setup, not a commodore.

**RA35GT** · 06-08-2009, 11:45 PM

hrmm, you may need to get the wiring diagram from the gas fitter dood.

Does it look like a relay? Just wondering if its a solid state IC type device instead of a relay as it doesn't seem to have enough pins to switch a fuel pump and monitor starter and ign otherwise?

**takai** · 06-08-2009, 11:48 PM

Um, do you have another car you can test it on? If so, then connect Gnd and -ve Coil and then apply power to one of the two pins, see which way it trips.