hey all
got a weird problem that I cant make any sense of. Did a 1jz conversion on my ga70 supra. Everything works except the tacho only reads 0 if I switch the AC/Econo on. This wasnt a problem until I got the aircon regassed but now it is rather irritating. Has anyone had this happen? Any ideas what it could be? I have a spare ac/heater control unit which I could try if people reckon it would help..
Also I had to use a tacho booster in order to get the tacho to work originally, could the AC somehow be interfering with this?
any help much appreciated