Rust advice needed

[abtx]

Originally Posted by Laird Scooby

is it in the bottom of the rev counter? If so, it's the boost gauge (if you have the HPT or someone has changed the cluster) or it will be, as previously mentioned, the water temp gauge.
If it's that, the cluster probably needs repair and other gauges will follow in time if it's a PCB problem on the back of the cluster or if it's the gauge itself, likely to die completely although one PCB fault can also cause that.

Try setting the heater to hottest, directing air to the vents and fan on full with the outer drivers side air vent open - if that makes the gauge behave after running for a few minutes, likelihood is a dry joint on the cluster PCB. Open your window and aim the vent out the window or you'll cook in this weather!

Will do, thanks! Will post a picture of the gauge later on today.