Rough idol, occasional stall out, running rich smell. Have relaced plugs,#4 coil,oil,filter,air filter. Could it be the injectors? if so, do I clean them or replace them?

This could be a number of things. I'd like to know more about the cars maintenance history and any recent repairs that you have had performed. Symptoms of a rough idle and the smell of raw gas could be related to a clogged air filter, fouled spark plug, bad COP (coil over plug), or related wiring, clogged CAT (too much back pressure), dirty or defective, MAF sensor, damaged EGR valve, timing, damaged intake valve (need to perform a compression test to confirm), or a damaged fuel injector (the injector could be clogged, worn out and no longer spraying correctly). Please write back. I'm not sure what tests and inspections, you have already done. Were there any other symptoms? Did the engine light come on at all? If so, did you retrieve any codes? Let me know if this information helps and where you want to start from here, good luck.

When checking for Vacuum leaks, did you use a water spray bottle on seams and vacuum lines and EGR pod?(engine running)

Check for air leaks in exhaust before O2 sensors. O2 thinks its running lean from air leak in exhaust header and enrichens fuel charge.

Fuel injectors dirty, not closing tight. Switch injectors to other bank and see if Error Code moves to relocated injectors.

Bad spark plugs, check if you have fuel runners in your intake.

Sounds like it needs a service. First things I'd do is Change the air filter unless fairly new, change the fuel filter unless nearly new. Then check the HT, Leads, Plugs, Coil etc make sure all appear good and clean connections.

If its not been service (Oil/filter change) for a year, then that needs doing as well.

Air filter box cover lose and sucking to much air, check to see if cover installed correct. Also could be mass air flow sensor.

.A}.could be the fuel filter ..B}.converter is plugging up .C} a vacuum line has come dry-rotted and or is come unattached and is sucking air .D} .idle speed is too low ..E}.The firing order is incorrect ! ....F}.clogged air cleaner ? ...G} check all fluid levels for proper fill levels . or it could be the choke sensor ids sticking or faulty ....have you tried running any fuel injection cleaner and a good grade gas this is just a minor list of points to start with after all we all get bad gas sometimes .

The idle air control valve (IAC) may be stuck or failing. This solenoid-type device controls the airflow into the engine at idle. It is fed control input signals from the engine's computer. Over time, the IAC valve may become dirty from EGR gases and carbon, etc. It may have a worn pintle (valve head) or the return spring may be weak or broken, causing a rough idle or even stalling from an over-rich fuel/air mixture. The second thing to have checked is the throttle position sensor.TPS. These devices will "flag" a fault on your vehicle's onboard OBD-II computer, which a decent code reader/scanner can display and clear. Third, a dirty throttle body housing/venturi can cause rough idling and poor response. A special cleaner is needed to remove oil and carbon residues from the specially-coated inner surfaces of the throttle body. Fourth; you may have a Mass Airflow Sensor (MAF) that might be failing/malfunctioning. Some vehicles use these instead of the Manifold Absolute Pressure (MAP) Sensor, which you may have. These sensors need to be checked and verified that they are functioning properly. Fifth; check/change your vehicle's fuel filter, and verify proper/adequate fuel pump pressure and flow performance. Don't run your vehicle below 1/4 tank of fuel...doing this sharply reduces the life and cooling of the in-tank electric fuel pump. These are not cheap, or easy to replace!

sounds like you have some bad injectors. if your smelling fuel it sound like one of them are stuck open. that would cause it to run rough. i think the injectors are like 35 each i would put them in and run a fuel system cleaner and put a new fuel filter when you do all that.. if you do it yourself it should run you about 180 to 200. Its not that hard to do. If a shop was to do it it could cost up to 500

1. change air filter. 2 check timing. 3 check all fuel lines and connections for leakage. 4. dirty or clogged injectors.

Check and clean the IAC valve. Idle Control Valve. Use brake cleaner or carburater cleaner . Remove the duct work from the air filter assembly. It is located just inside . Run the engine at 1200 rpms and spray the valve. The valve can also be removed and cleaned.