I have a 2002 SLE V6 (not supercharged)
I started her up this morning and the engine is running real rough. Feels like a miss in the engine. Sputters when you accelerate and feels like its going to die when braking or stopping. The service engine soon light was on now its flashing. I had autozone do their diagnostic test and it gave 4 different codes.

(p0404) - says egr system fault - failed egr pressure and position sensor where applicable, failed egr valve.
(p1404) - egr valve stuck open, carbon blockage of the pintle, failed egr
(p0306) - cylinder misfire detected - cylinder 6, ignition system fault-spark plugs, wires, coil, vacuum leak, injector fault, high or low fuel pressure.
(?)- evap purge/vent solenoid circuit condition, purge or vent solenoids defective, fuel saturated vapor canister, failed evap vent solenoid.

DAMN!

I have already replaced my egr a month ago, and 6 months ago I did my plugs and wires. Should I recheck everything? Can anyone please help me figure out what my next step should be????? PPPPPLLLLEEEAAASEEEE

Sure sounds like a vacuum leak to me. Start checking the hoses and spray carb cleaner around all the vac lines, LIM gaskets, and EGR tubes. Listen for a RPM change.

P.*. !!!! I also just noticed that its burning rich, the exaust is putting off a strong emissions smell.

it may also be a leaky injector...

If you read the fsm EGR position is measured within the EGR. If the pintle is stuck open, the car will run and act like a vacuum leak due to the exhaust pouring through the open valve.

http://gearchatter.com/viewtopic8967...6dd364fce25e14

It would be worthwhile for all of us to read how the EGR works in the above link. Great info to know.