On my '05 Legacy GT I just installed I used a new ECTS connected it and the fans run on full and the gauge goes right to hot I don't understand what's going on.. that's the only issue I have right now.

faulty sender or pinched wire (short to ground)

I'll check the wire but if it's pinched pinched on what? What happens if you disconnect the wire it should read cold correct?

Also let me guess because it's showing as thinking it's hot then it's cutting back on fuel right?

I'd guess a faulty temp sensor.

Did you keep the old one?

why are you using a used temp sender? why not new? less than $20 for a new one

It's a new sensor but like I said I found the issue I had the purge solenoid and the CTS plugs mixed up.

 

btw this is the sensor I installed not that it really matters

 

https://www.summitracing.com/parts/smp-tx157

Edited October 3, 20178 yr by 1-3-2-4