Quote Originally Posted by collin View Post
Check fuel pressure at the rail. Any noise from the pump?
Yes, the pump makes noise

Quote Originally Posted by 1_fastsilverado View Post
Possible, but to me seeing that it's temperature related I would also try the temperature sender or the coolant temp sender (yes they are different). If the gauge reads good and isn't acting up then I would rule out the coolant temp sender and just focus on the temperature sender as it communicates with the ecu.
It has a new coolant tempature sensor, witch other one are you talking about?

It was doing the same thing tonight, again up untill 180 ish. Im stumped on this