temp problems

imboss1imboss1 Member Posts: 1
edited April 2020 in Chevrolet
my 94 chevy 1500 has started running between 220 and 250 with a 190 thermostat and around 100-120 without one. ive replaced the thermostat and its still doing this. what else can i do or do you have any ideas why its doing this?
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