For some reason after I drove my truck for a while I parked it for a like 2 hrs and I wanted to used it but it wouldn't start so I opened the hood and I noticed is was still lil warm and choke fully open ...my truck got the thermostat choke and it open as the coolant gets warms ...but why did the thermostat choke never close again ..is it because the coolant was still warm or something else is wrong with it...