| Symptom | Likely Cause | Remedy | |---------|--------------|--------| | Rough idle | Vacuum leak (gasket/ISCV) | Re-seal intake manifold | | No start (cranks) | Cam/crank timing off | Re-check chain alignment | | High fuel consumption | O2 sensor slow | Replace sensor (DENSO 234-4056) | | Overheating | Air in system | Vacuum fill coolant, bleed heater core |