Inconsistent Idle

Hey I’ve got a 2UZ-FE 2000 tundra, and it was driving great until a few days ago. It developed an inconsistent jumpy idle and threw a system too rich code on one bank. The code went away, and idle went away for a day, they it over heated. Super low on coolant when I checked it out, but no apparent leak. Inconsistent idle is back after overheating. Any thoughts?? Just replaced timing belt, water pump, thermostat, coil packs, spark plugs, vacuum lines, mass airflow sensor, o2 sensors about 500 miles ago

 

Check vacuum hoses for idle issues. They are old and tend to crack and leak.

 

Look for any damaged wires on the camshaft position sensor were the separating belt might have cut into them. Happens after timing belt has been done and the wires are not routed correctly.