Too much raw fuel in the exhaust is the common cause of an orange catalytic converter, and that is usually due to a spark-related misfire. When the exhaust manifold is what gets orange, the fuel and air is burning there instead of inside the cylinders. In some cases that is due to a valve timing problem, but it is more commonly caused by badly retarded ignition timing. Is the check engine light on ? if so I would start with a scan to see what it sees wrong.
Check out this guide, it might help
Sunday, August 6th, 2017 AT 11:08 PM