I have a '03 dodge neon stx, mileage 75,000. my check engine light came on around six months ago! sooo i checked replaced the ignition coil,spark plugs, n spark plug wires. then the light manages to come on every month. the mechanic changed my coil,spark plugs, n spark plug wires again! the car runs fine for a couple days, but then acts up again. this time the engine light began to flash n the car starts to loose power when idling. it does not cut off though, but when i accelerate it has lack of power. when i open the hood the engine is going crazy. soo i take it to the mechanics, he said that the 2nd cylinder is not getting the correct amount of compression. that it needs to be checked. however, i wanted to get a second look so i took it to another mechanic n he showed me 4 different codes! 1.PO441 evaporative emission system incorrect purge flow, 2.PO300 random misfire detected, 3. PO352 ignition coil B primary/secondary circuit, 4. P2305 ignition coil B secondary circuit. He said that it could be a problem with the EGR SLAVE VALVE SOLINOID SERVO SOLINOID and EGR valve. i dunno who may be right. i am hoping nothing is wrong with the cylinder. Can someone plz help! this problem has been going on for tooo long. thank u

 

Changing the coil, plugs and wires should have fixed anything directly related to the ignition system, so for now I think we can rule that out.

1.PO441 code should be the bad EGR valve (engine gas recirculation - which puts exhaust gas back into the cylinder to be burned a second time to lower emissions). If the valve is stuck open, it could very well be your entire problem. Allowing excess exhaust gases into the cylinder will affect idle more than WOT. And more exhaust gas than air/fuel could, again c-o-u-l-d, make for bad sparks and explosions within the cylinder(s) setting off the codes.

The misfiring could be a bad coil, plug, or wire. Those should be fixed now that they've been replaced, so maybe the codes are leftovers? Were the codes cleared after you replaced them (even if the check engine light is off, you should still have to clear the codes).

The only other thing that comes to mind would be a bad ground to the engine block (would be something I checked, but wouldn't expect it to be the entire problem).

Going by the codes and what the car is doing, I would say what the first mech did was a good first start, but I bet you need an EGR (though I doubt an ignition system tune hurt anything).