CHT and coolant

[Itsjustacrowd]

Where are your CHT’s during prolong idle?

Today, casual drive home in 98° heat, temps got up to 260.
I got a water pump on the way with new pulley and belt. Suspecting that's the issue since temps stay normal on cooler days.
Pump is probably not flowing correctly

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[Itsjustacrowd]

Not sure if this will be helpful, but I posted this back in 2019 - TSB 19-2049 from Ford - faulty CHT sensors in 5.0’s:
https://www.mustang6g.com/forums/threads/tsb-19-2049-cht-mil-dtc’s-p1289-or-p017d.120216/

I know OP doesn’t have a 2019, but that’s not to say that a faulty CHT can't exist in any Coyote 5.0.

I wouid check the harness to the CHT, check the pins in the connector AND do a continuity test of the actual CHT sensor to make sure it's in spec before throwing parts at the car.

Here's how to change the CHT if anyone needs it:
https://www.mustang6g.com/forums/th...sor-on-a-2016-mustang-gt.130632/#post-2696524

Thank you for the links. Seems like a straight forward job.
I'm not suspecting a fault sensor since temps aren't all over the place constantly. They seem steady on cooler days and super high when it gets hot. Today I saw 260 on my way home in 98° heat