i have an 02 tacoma that has been sitting for a bit. i went out and started it up to let it run for a bit and went in the house when i came back out, it was off. The alternator was seized up and broke the belt causing the mechanical fan to stop and water pump to stop and made it overheat. I replaced the alternator and belt and had two misfires 1 in cylinder 1 and the other in cylinder 2. I replaced the plugs and 2 bad coils and it was running fine. keep in mind i also has the code p0115 for the engine coolant temperature circuit other than the misfires. engine seemed to run fine so iI took it down the street and after a mile it started smoking and overheating. The coolant is looking dark, but the oil looked fine. i also used the block tester kit from autozone and the fluid stayed blue. Any thoughts?