To much gas in all 4 cylinders

When I remove the spark plugs there's a lot unburned gas on all of the plugs are soaked in gas . Using a timing light I verified all the plugs where getting spark. Every now and then it will start and run for about 30 min before it dies and won't start. Most of the major componets have been changed. The only times I haven't changed is the timing belt and distributor.

No timing belt.. Has a chain.. Suspect fuel pressure regulator or intermittent no spark but injector pulse is still ok and flooding engine...

Replaced fuel pressure regulator. Spark appears to be normal on all the plugs.

At the time you are testing the spark I agree but how about as soon as it stalls out? .. Run engine until it stalls.. DO NOT crank engine again... Pull plugs and see if wet... Then test spark with a spark tester! .. Weak spark is same as no spark! .. That's all the ammo I got, hands-on testing is required.. Good luck!