Rough idle chevy 350

SOURCE: 98 Chevy Tahoe 5.7 liter engine cuts out and

Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

SOURCE: 2.5l iron duke will not idle

Scan again & check reading of the ECT sensor,coolent sensor as it may be reading to cold for present temp & just dumping fuel as it is seeing -30c all the time.I as well own a iron duke(1987)

SOURCE: 1989 Cavalier Z24 Stalling problem

Have you heard of Noid lights? You unplug the fuel injector and plug these in and they will light up if the injector is getting power. This might give you a better hint. There are also lights that go inbetween the spark plug and wire. Between these two items you may be able to narrow down the problem to a specific system. I believe that your car has a coil pack. Some of these engines have problems with the crank trigger. I believe it is located on the back side of the motor. If you decide to change it, be careful. I have heard of them breaking into two pieces and becoming a big problem.

SOURCE: 99 Chevy cavalier 2.4L

http://realfixesrealfast.com/realfixesrealfast.com/Diagnostics/Pages/Stall_at_idle.html

This may be your problem

SOURCE: 2001 Chevy venture intermittently running rough.

Check air filter. Check for any vacuum leaks. Check condition of plug wires. Were new plugs pre-gapped? If not, make sure the spark gap is correct for your vehicle.