Hello all. I am having problems with my 2001 Land Rover discovery 2 4.0 liter v8. My head gaskets went out about 2 months ago and I bought a kit and put all new gaskets in the rover. It’s running great but my catalytic converters we’re glowing bright red so I ordered a new full system and installed it. It’s running really good. No misfires, no stumbles, no nothin. The only problem is that my catalytic converters are still glowing red after about 5 minutes of running and I have little power. Can’t go more than 10 mph going up a hill. Read a couple forums saying it might be the coil pack or my engine is running too lean?? How would I adjust the motor so it’s not running lean anymore?? Any suggestions? Been working on it for 2 months no to no luck. Just need some help now.