Engine Performance problem
1993 Cadillac Deville V8 Front Wheel Drive Automatic 117k miles
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starts good cold. after running then stopping for 10 mins.engine cranks & tries to start .after it sets for acouple hours .it will start again.recently I had to replace parts for other problems,including a gas tank{leaking] with new fuel pump & sending unit.also a new EGR & O2 sensor.still have original ignition system and plugs have 29k on them any suggestions

Paul