tacho install help

[rsx84]

i've just wired up a 5" autometer tacho to my car but there seems to be a problem with the ECU, what happens is when i turn the key to prim the fuel system the tacho will read 0rpm, once i start the engine the tacho will read 3000rpm and nothing else it wont go up or down??? the engine is an rb20det from a r32!anyone else been through this???

[shnaped_second]

have you made sure that it is hooked up corectly, i think it should be hooked up to wire no. 7 of the ECU for a RB20 and you have a correct power and earth suply, if this is all in order i think it may be that your gauge is rooted and if there were sumthin wrong with your ECU, you would have a lot more problems than youe tacho not working properly.

[wreckedhead]

yeah you have the wrong wire, it happend to me, and same thing, but i got it right eventually

[rsx84]

thanks guys i'll double check the wire i'm using is the right one, i have a pin output diagram for the rb20det but the bloke who wired up the ecu to the ignition marked out the wire for the tacho for me??? also the other bloke who put the engine in said that he couldn't get a tacho signal??? the tacho is brand new autometer pro comp 5" with shift-lite so its not a cheapo either. A, it could be the wrong wire B, the ECU is not sending out a signal..... thanks again..

[NA_R33]

ill take the tacho of ya hands if it doesnt work

[rsx84]

:confused:

[NA_R33]

joking, but seriously, i think there has to be a tacho wire for the ecu otherwise it couldnt work properly, do a search on here someone would have the diagram for it.

[rsx84]

joking, but seriously, i think there has to be a tacho wire for the ecu otherwise it couldnt work properly, do a search on here someone would have the diagram for it.

i have one already.lol. the tacho still works fine so i'll keep it