Hello All.....hope you can help, here's my story: I have a 97 lx450 w/110lk miles all stock and so far one engine, one head gasket with full head rebuild, ECU and today new plugs, fuel filter, both O2 sensors, new plugs and wires, new distributor and rotor, throttle body intake hose, PVC valve, pvc grommet and hose, Air filter, Oil change and ran Sea Foam and last week two bottles of Gummot fuel injector cleaner, Inspected Wiring harness near EGR valve and rewrapped w/heat resistsant wrap tape And still having problems !!!!!!! CEL light on and engine shakes really bad but smoothes out if I take it out of overdrive ERROR CODES: P301B - CYL 1 MISFIRE P304B - CYL 4 MISFIRE P171B - o2 SENSOR P300B - RANDOM MISFIRE Just noticed tonight that the first CAT is glowing red and for some strange reason I'm getting water under the passenger side floormat HELP! the wife is pressuring me to get a minivan if I don't get this beast fixed !!!!