Attached to the valve cover is a hose on the driver side. Unscrew the nut closest to the valve cover and that is the PCV valve. It is a straight PCV valve, not the elbow shape you may be looking for.
A 2000 Dodge Neon does not have a maf sensor.
If the light is on, it will need checked and diagnosed.
NO
A dodge neon does not have a heater valve. The inside temp is adjusted with an airflow control door inside the dash.
Inside the transmission, on the valve body.
A tire rod on a 2000 Dodge Neon cost approximately 119.00 to replace. 15.00 at Napa
If you are looking for a modulator valve, it does not have one. Dodge does not use them.
Rip the old ones out. Then replace with new ones.
I would say yes, in fact the engine you are removing SHOULD have one since it is a 2000, the wiring harness should already have the connector attached.
no a 2001 dodge neon motor will not work in a 2000 neon
Haynes repair manual, Dodge Neon 2000 thru 2003. Book #30036
Alternator going bad..replace it. Just had the same thing on my 2000 neon