write-up, so all of what I'm saying may be redundant. You should read his write up). Problem is, it takes a little experience to really be able to tell the difference between a good clutch and one that's going out. I wonder about the thermostat because the car seems to respond to your actions, and sticky thermostats don't: they have a mind of thier own. How old is the thermostat? And is it Nissan or Joe's cheap auto parts' imitation? Last comment: if you've put the work in to get to the thermostat, test the old if you want to know what happened, but put in a new one!