Sierra Gauge Readings

[Guest David Cairncross]

Hi,

 

My instruments come from a newer car than my donor which didn't have the tacho. While they all respond ok to change the temperature always reads high and the fuel reads low.

 

While this is not especially critical it occurs that the tacho reading might be incorrect as well which could be more serious if it under reads. It could also explain why it was twice as loud as permitted for the SVA when operating in its pan scourer-free mode.

 

Do I need a voltage regulator or something?

 

David

[IanS]

Temp guage high and fuel guage low are out electrically in opposite directions so a voltage regulator would struggle to help.

Most tachos are fairly insensitive to voltage. A good check is at MOT time when emissions are being checked the tester will have a good tacho built in, just ask and the tester will normally compare readings.

 

Ian