Is it accurate? I know the 7.3L has an ECT sensor, but I thought it was just used for the dash gauge and I have heard it is extremely inaccurate when monitoring it.
Also, is your 2002 a manual?
Its an auto.
And yes I would say its accurate, temp reading does climb up then the t-stat opens and temps drops down around 190-195*. Stays there while driving normal and if I hot rod it around town or towing the temp does go up.