everything looked good i have no doubt about replacing the map sensor im concerned about the air flow problem i seem to be having pull the pcv valve off it finally idles but you put a new one on and it wont idle at all dies right away has a brand new air filter too im so lost and frustrated and the boyfriend has about given up. today he gets to replace the front mail seal and coil pack map.iat sensor is going to have to wait until more money is available im afraid

 

Replace the sensor first and then see about the idle.

 

ok i'll see what i can do about getting the money together for this little part.

i do have a question what does the map sensor do anyway i've read my hanes mannual like a good neon owner should and it doesnt explain it very well also what happens when it goes out?

 

MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP)
The PCM supplies 5 volts to the MAP sensor. The MAP sensor function converts intake manifold pressure into voltage. The PCM monitors the MAP sensor output voltage. As vacuum increases, MAP sensor voltage decreases proportionately. Also, as vacuum decreases, MAP sensor voltage increases proportionately. During cranking, before the engine starts running, the PCM determines atmospheric air pressure from the MAP sensor voltage. While the engine operates, the PCM determines intake manifold pressure from the MAP sensor voltage. Based on MAP sensor voltage and inputs from other sensors, the PCM adjusts spark advance and the air/fuel mixture.

 

so basically the map sensor determines the air/fuel mixture the car needs to run and if its not working right or at all the car wont idle right and possibly die b/c its running too rich and doesnt know how much air it needs right............ sorry i understand lamans terms better then techno stuff

 

Which is why I said fix the sensor first before worrying about the PCV valve.

 

yay i actually understood that go me !!!!!! pay day cant come fast enough that parts not cheap lol

 

Any junkyards near you?

 

yes i'm going to call them today and see what i can come up with thanks for the idea