After owning a 78 CJ-7 and 2004 TJ, I passed the love of jeeps on to my son. He bought a 2010 JKU and we are having an issue. The exhaust is getting red hot behind the pre catalytic converter. We have been fighting with this thing for months and it seems to be one thing after another. Here is what we have replaced so far. Catalytic Converters, timing chain, plugs, wires, and distributor, replaced exhaust manifold with headers, and PCM. Just not sure what to make of this. Never seen exhaust get this hot this far down. Code reader is reporting 7% fuel on bank 1 and 14% fuel on bank 2. Is this a bad PCM? Bad injectors? This all started with misfires. The cat system was replaced 6 months ago due to an exhaust line that broke at a weld going into the cat. Any help is greatly appreciated.