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1994 Chevrolet c10, 305 hard to start when warm

1994 C10 - Starts quickly when engine is cold- sometimes wont start at all when warmed up. It runs fine, gets good mpg, but it it runs very long, and try to restart

- it will NOT start. Cranks - but doesnt run.

I am going to check fuel pressure, and spark; but anyone experience this, and have suggestions to narrow-down repairs needed?

The check engine light is NOT on.

Battery voltage is good, alternator charging.

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1) Fuel pressure is good 2) Spark appears to be good 3) new fuel filter 4) Module or coil?
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