Ei I read your articles on tach problems but I cant seem to find the Q457 that I have to replace. I attached pics so you could help me out. I tried checking the voltage for pin 2 which is blue black and it only read .09 Volts. Could you please help me out.

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009453.jpg

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009452.jpg

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009455.jpg

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009449.jpg

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009450.jpg

http://i451.photobucket.com/albums/qq233/luscioussluke2/29072009451.jpg

what board is that frm my friend? that board doesnt resemble my b13 board, so im curious as to what vehicle that hails

Im using it in my b13, for my roller rocker. I dont know where it originally came from but Im sure its JDM.

Any idea calum?

I got the tach working but I connected it through the distributor and now Its working fine but now I swapped to a digital cluster gauge and my friends told me that I cant use the signal from the distributor and that I should use the signal from my ecu. Is 0.09volts normal for the ecu tach out? because i read the FSM and it said that I should be getting around 1 to 5 volts. Any help would be appreciated thanks :)

anythinG?

The tach output from the ECU is a pull down, it switches to ground. So you won't see anything unless you put a pull-up to something. The cluster has the pull-up built in.

Thanks a lot for the reply, I really appreciate it bro. Nobody knows anything about ecu problems here in the Philippines so I'm gonna document it in a local Nissan forum here. Ill try connecting the cluster and see if i get anything. Thanks again

I tried connecting the ecu pin for the tach to the digital cluster and nothing happened. I tried getting a voltage and I got nothing too. Without the cluster connected I get around 0.023v. Im trying to look for another ecu I can borrow and then I'll try it again Is there another way to put a pull up without the cluster gauge?

Yes, just wire a 10k resistor from the tach line to +battery.