Yes, the EGR valve, or port EGR
Worn piston rings and or clogged EGR system and or failed EGR valve
Would this cause the car not to start If the EGR VALVE is bad
A bad EGR valve in a 2000 Saturn can have several symptoms. The EGR valve can cause misfires, the valve can cause vacuum leak style problems. There could also be an engine knock.
Yes
No, the catalytic converter is downstream from the EGR valve so it has no effect on it.
Even a good EGR valve may cause an engine to stall in hot weather.
A faulty or clogged egr valve can cause an engine to run rough. If stuck or clogged the valve can be cleaned after removal with carburetor cleaner.
nope
That could be cause by a worn out rubber grommet that surrounds the EGR valve. Or possibly the EGR valve may not be pushed in all the way.
EGR VALVE IS LOCATED NEXT TO THE TOP RADIATOR HOSE AT THE ENGINE, IT CAN CAUSE ENGINE TO MISS, STALL AND SURGE.
it will cause pinging running your combustion hotter
bad iac valve or vac. leak