Engine Alarm/ Temp question

Model# 250DHLSCS (2008 250 ETEC HO).

Had an injector replaced last month. Brought it home and out - noticed the temp guage was maxed all the time (even when cold started....) Obviously not hooked up right when injector replaced.

No issues a few times out.

Yesterday Check engine steady alarm and light came on twice on plane. Restarted, worked OK, went on again - brought it home.

What I did notice however is that the temp guage bounced back and forth a couple times before the alarm went on, like it wanted to work....

I am positive the problem does not exist with overheating.....


Does the the temp guage have to be calibrated?

I havent checked my fuel filter yet either.

Any comments?

OH ya....My mechanic cant get to it for a week and the neerest is 2 hours away, as I go on vacation starting today!!!!!!