My camry sometimes start after a long wait.aditionally runs bad.the light of check engine is always on.I put new the distributor'the fuel pump;fuel filter;battery;spark plugs;spark plug cables;please help

My camry sometimes not want to start sometimes start.I put new spark plugs and cables.and few days after I check one spark plug and was to darty and black.please help

Black spark plugs could mean weak spark.
Check for a good strong spark at each plug. Chances are you need a new secondary ignition coil and condenser. Replace these two items together for best resulsts. If you haven't replaced the distributor cap and/or spark plug wires in a while, now would be the time to do so.

. Check for codes.

. Replace the coil.