I have a obd1 aba engine that says its overheating when it is not. I changed the waterpump a month/500 miles ago and did a full coolant flush. I already changed the coolant temp sensor but I feel like that has only made it worse. The temp gauge will rise as the engine warms up sometimes it stops at 190 and slowly rises to 230 sometimes it goes straight to 230. After warming up for a little bit I check the hoses and the thermostat hasn't even opened because the hose before it is hot and after is cold. When the thermostat opens the gauge either goes back to 190 only to rise to 230 again or just stays at 230. I know for sure the engine isn't overheating because the gauge will say its well past 230 but the engine is barely even warm and there's no other signs of overheating. Is it possible that another faulty coolant temp sensor could be doing this?