- Buick Ownership
I've got a problem with my 92 Lesabre, where it hesitates at full throttle and sometimes gives a check engine light. I popped the hood to look at it after a good long drive, and heard the curious sound of boiling water inside the overflow bottle. The coolant must be hotter than hell to make it boil like that. So now I'm trying to diagnose. The water pump is fairly new, and nothing is leaking. I'm thinking maybe the thermostat or coolant temp sensor. Has anyone experienced these issues before?