Code P0201, P0171, P0508 dodge neon 2002

SOURCE: My car is not accelerating when I depress the gas pedal

i would change the fuel filter

SOURCE: Can you have the idle air control valve checked to see if good?

I had a similar problem all it was a the rubber boot after the sensor was sightly disconnected and produced the same code. I would even take it as far if there is a decent rip in the boot would also cause the problem.

and yes you can test it

SOURCE: fuel/accelerator problems. dies when accelating or at idle. runs when accelerator held in one position for a short while.

CHECK THE IDLE SPEED SENSOR, UNPLUG IT AND SEE IF THE VEHICLE REVS UP A BIT. IF IT DOES, THEN REPLACE IT. ALSO CHECK THE FUEL PUMP RELAY IN THE FUSEBOX. HOPE THIS HELPS. .LET ME KNOW. GOOD LUCK

SOURCE: i have a 2005 dodge neon, throwing codes p0129,

you will have to deal with the u code first. This is a communication problem between computers. My first guess is you have a bad computer or an open wire somewhere. Their is no way a backyard mechanic can do this without the proper tools to diagnose and with the knowledge to not cause further damage.

SOURCE: my 2003 dodge stratus idles rough like it might

check or replace fuel filter for clogging up. if it does clog up, then you will not get enough fuel to engine to run it properly. it will stall at stops, and be very sluggish on takeoff. check fuel pressure if need be. could also be a bad catylist convertor. so check above first. Rent a fuel pressure guage from advance or oreilley's and check fuel pressure if needed. they will tell you the proper fuel pressure for your car.