Car cranks but will not start

What is your question?

1992 lexus sc400 cranks but will not start. Car is getting fuel. Replaced the distributor caps and rotors as well as all new spark plugs and plug wires. Also tested coils and both are fine plus installed a new camshaft position sensor

What makes this problem better or worse?

Worse when engine is cold starts up sometimes but once cold won't start again

How long has your 1992 Lexus SC400 had this problem?

A month