Honda CVCC engines have a third valve on each cylinder. It’s a tiny valve compared to the normal intake and exhaust valves. Like the intake and exhaust valves, it’s cam operated and has an oil seal to meter oiling at the top end. And like any valve seal, this auxiliary valve seal can harden and crack over a period of time. As a result, oil is sucked into the cylinder to a point where it can foul plugs.
2006 Hyundai Santa Fe Heater Blower With No Speed Control
This specific HVAC system has no self-diagnostic abilities, but does control the blend doors and A/C while manually controlling the blower motor speed. This article is intended for the learning technicians that have an interest in diagnosing and testing a Hyundai HVAC...