Just put a thermastat, bleed coolant system, and it runs good but the coolant gauge always read staraight up and now it a few lines to the left and varies a few linestill it goes straight up. does any of yours varie a small bit. I read out the coolant temp with my scan tool and its 180-192 is the range...Do you think thats normal, i just just dont remember it varrying at all. Maybe the coolant sensor is over sensitive or bad?