99 Chevy Lumina runs rough scan gives me "cylinder

P0346: Camshaft Position Sensor Intake Circuit Range/Performance Bank 2 http://www.autocodes.com/p0346_audi.html

P0391:Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2
http://www.autocodes.com/p0391_audi.html

P0304: Cylinder 4 Misfire Detected http://www.autocodes.com/p0304_audi.html

P0306: Cylinder 6 Misfire Detected http://www.autocodes.com/p0306_audi.html

P0305: Cylinder 5 Misfire Detected http://www.autocodes.com/p0305_audi.html

P0300: Random Cylinder Misfire Detected http://www.autocodes.com/p0300_audi.html

P0300 is a random or multiple cylinder misfire, and P1381 is a misfire EBCM (Electronic Brake Control Module) or PCM (Powertrain Control Module) Since you mentioned replacing fuel components, it could be as simple as a fuel injector being clogged up causing a cylinder misfire. Have you checked your fuel injectors?

P0300 = Random/multiple cylinder(s) - misfire detected.
P0302 = Cylinder 2 - misfire detected.
P0304 = Cylinder 4 - misfire detected.
P0306 = Cylinder 6 - misfire detected.

A misfire can be caused by a few things. The most common causes are usually spark supply or fuel supply. Get BOTH of these checked.
All the misfires are on the same side of the engine so I would suspect a fuel rail or an injector issue on that side of the engine.

After a fill up, the fumes in the gas tank are very concentrated. If problem with evap system, it could cause problems after a fill-up. Just a thought.

before you replace injector , check compression in that cyl. Also check for pulse signal at connector while cranking the engine.

P0301 Cylinder No. 1 Misfire Detected
P0302 Cylinder No. 2 Misfire Detected
P0303 Cylinder No. 3 Misfire Detected
P0304 Cylinder No. 4 Misfire Detected
P0305 Cylinder No. 5 Misfire Detected
P0306 Cylinder No. 6 Misfire Detected
P1346 Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1349 Variable Valve Timing (VVT) System Malfunction
P0330 Knock Sensor
P0446 EVAP Vent Control Fault
P0430 Catalyst System

Stop driving immediately.....

You defiantly skipped on your timing........

Rough idle can be caused by dirt in throttle body or EGR system, but there are many other possibilities. The service engine light indicates the computer has detected a fault. If you can get a free scan at your local parts chain and post the trouble codes to us we can give you more specific repair recommendations.

Check the DIS module or injectors. Check to make sure you have a spark on each cylinder. One cylinder could be misfiring

DTC Number
P0160 DTC Name O2 Sensor Circuit No Activity Detected Bank 2 Sensor DTC Number P0300 DTC Name Random/Multiple Cylinder Misfire Detected

complete tune up plugs wires distributoe cap and rotor