Crazy tacho tb42

[lucas.bree]

I have a 1991 tb42 efi and the tacho is going crazy with the key on reds no engine running it bounces from 0rpm to 6000rpm and back and stops in the middle somtimes.The motor runs fine once you have started it but still the tacho crazys.How do you test the tacho where is the feed coming from is there a general problem these have any help would be good thanx

[NissanGQ4.2]

I had a similar prob a fair while ago and got it looked at by a guy that specialises in tacho's, pretty sure he just fixed it, think they get problems with dry joints on the circuit boards.

what area are you from???

[NissanGQ4.2]

Don't forget to introduce yourself in the intro section and tell us a bit about yourself and your rig

[Woof]

Hi Lucas, as Todd said post up an intro mate, you will probably find that you will get some more assistance that way.