why does the passenger side catalytic converter glow red hot after being replace on 1993 Lexus LS400

i have replaced the passenger side catalytic converter, replaced the injectors,replaced the timing chain and the car still gets glowing after only a short period of time.What is causing this problem?

Asked by for the 1993 Lexus LS400
either a missfire or retarded timing. get a shop to help you before you burn up the new converter.