I need to know where is de dodge neon 200 computer port

you will have to have the key programmed to the different immobilizer and the immobilizer programmed to the ECM

The front struts for a 2005 Dodge Neon are $66.99 each from Autozone. The part number is G55892 and they show as a stock item.---------------------------------------------------------------------------------
Programmateur De Calculateur

Use any good quality, brand-name engine coolant, preferrably pre-mixed. If not pre-mixed be sure to use only de-mineralized water.

If you don't know how long it has been since it has had spark plugs and a tune up, it might need a complete tune up. It might also have a vacuum hose off , cracked , or loose on a connection, which a person can visually look at and see, most of the time.

All engines for smog emissions for many years including the ones you listed require EGR in the US.

Hope this helps.

The front should be even with the rear. If it is low, the most likely cause is worn out struts. The repair should cost ~$200. Don't try to do it yourself as you need some specialized tools.

Ok this port for charging in the pipe thicker tries to recharge the system with a UV dye that this is where you said because if you drain your A / C because it has no gas is leaking

The car should have R134 freon (and should have a label in the engine compartment indicating so). R134 ports are two different sizes and your charge hose should only fit the correct port

knock sensor is located under the intake manifold in front of the starter. what codes did you have?

i think you need the service and repair manual to fix your problem so go to the given link and get the manual http://toolsnyou.com/