Vehicle idles good, give it gas and it pist and putters and back fires

Ok that to me sounds like you need to clean the throttle body it easy buy carburetor clean just srap a little inside the throttle body n clean it that will help you the problem is the trottle body gets dirty sticky and won't idle good n stall remember don't put to much. Just a few spats inside the when you put the hose back it might take a few minutes to start because of the amount also don't accelerat it to high when it start good luck

when was the last tune up done on it? have you checked the spark plugs and firing order to make sure it is correct?

Map Sensor or Crank Sensor. If you have a code reader the map sensor should throw a code, the crank sensor most often will not. Both will cause the car to start, idle to around 1,000 R's and then die.

sounds like the timing is off. check the firing order to be sure your plug wires are on the correct positions on the coil packs. if that checks out, possibly a timing chain may need replaced. i hope this helps
don k.

Sounds like dirt made it's way to the fuel pick up from sitting on an angle. You can try removing the sender through the rear seat to detect a clog and or the fuel filter underneath. Honestly..... have it towed to reputable repair shop or dealer for evaluation.

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my 2000 Dodge Stratus 2.4 while idling, the engine seems to surge

Sounds more like a timing problem than an O2 Sensor. Distributor out of Sync would be my guess. It ran better at Higher idles because the timing belt/chain was tight from tension at low idle the timing was off which caused your problems. Now the belt is either broken or so loose the timing is out and the vehicle won't fire. If it has a Distributor cap remove it and watch the rotor. If it turns the belt is intact but Timing may still be off.

Try cleaning the throttle body (throttle body cleanner ONLY). Uncover the TB (engine off) & inspect the butterfly by moving the throttle by hand, if the underside & down inside the TB has a bunch of carbon (black soot) that could hamper with the idle! Also, check the fuel pressure @ the rail, under 60 psi could cause bad idle. Air filter clean? Did you make SURE that the terminals under the spider injector wiring harness has NO pins bent over during connection?! Also could check the throttle possition sensor & the mass air flow sensor if need be.

it could possibly be a sensor but i am almost positive it will tell you that your idle speed is too low. You must set your idle speed back to normal. Go to your throttle cable and there should be a screw (maybe two if you have cruise control) that you can move back and forth to control position of throttle spring. Once you have your RPM's set around 800 (or at smooth idle without sounding too high) then you have corrected your idle speed.

sounds like you have spark plugs mixed up ever had them replaced