Chevy 350 express van 2000 runs great idles rough

when you put distributor back in most likely off a tooth

Sounds like you got some bad gas. Be sure and let the station know right away. They may be on the hook to pay for repairs.
Take the van to a shop and have the computer checked for trouble codes.
The gas tank and lines may have to be flushed.

Have you checked the computer for trouble codes yet ?

Try to get it running a bit to warm up the exhaust. Take a point and shoot thermometer and take the temp of the cat. If temps exceed 400 degrees I would start to suspect a plugged cat.

o-2 sensor

60psi cold / 30-45psi warm is ideal. I've seen (with that mileage) 45 cold/ 20 warm and that's acceptable - anything less start thinking about a new oil pump.

probable vacuum leak query brake booster

My 2000 Chevy express 2500 will not idle. When I come to a stop it dies. Starts back up a little flooded buy with RPM it smooths out but when I let off the gas it deis again??????

change plugs

Hi edsan 58,

Most gas injected engines run at a higher speed when started from cold....It's the cold start application working....As long as the idle speed returns to normal within a minute or two....longer when the weather is colder.....nothing to worry about

Regards Johngee10