Bouncing temp guage, need advice.
Hello all. I drive an EA GL CFI auto, and have the fairly common problem of a bouncing temp guage. However, in the past couple of weeks, I've notice it's been a tad erratic in the way it happens.
Ordinarily, one the car has warmed up a bit, it rises slowly to about halfway, then drops quickly back down to almost outside "Normal"
It has recently, been jumping up quicker, with jerky movements, and has also bounced above half-way a couple of times.
I'm going to be replacing the coolant bottle in a couple of weeks, I need one with a sensor, and was going to get it down at Natrad and have them flush the cooling system at the same time, I don't know when it was last done.
My question is, should I replace the thermostat as well? And if yes, is a non-gen one ok or would I be better off with a Ford one?
And also, is Natrad a good place to go? They are just round the corner from work, so I thought yes.
EA GL-Ghia pseudo operator
3.9 MPFI converted 4 speed
2.5 inch exhaust
NC Ghia interior (except rear trims)
Fairmont audio (with 4 speakers)
S-pac cluster with white dials
Trip computer and Fairmont interior lighting.
Half wired Ghia BCM.