[ultradx]

i been trying to figure out how to fix this,but no luck. I already replace the temp switch,but the needles goes crazy even when is cold. Any ideas?

Thanks

 

[MISTER2]

There are 3 temperature related things that are often confused.

Thermostat
Temp Sender ECU
Temp Sender Gauge

What exactly did you replace?
Have you replaced the coolant recently, and did you follow the BGB bleed procedure?

 

[ultradx]

I replaced the temp sending gauge,I try to do my coolant later on today.

 

[MISTER2]

There is probably air in the system, a pocket of air/steam goes over the sensor and causes the reading to spike.

Follow the BGB bleed procedure and see what happens.