i was wondering am i goin to feel any diffrence in my car after i get one cuase it is at the shop right now some people say you can feel alot and some say you dont feel much of course you have to go by how bad your engine was running but will i fell some more power

 

Yes you will, but do it yourself since it's easy. Use NGK plugs

 

You're gonna end up paying $200+ for $50 worth of parts if you let a shop do it.

 

What's involved in a tune up (for the DIY'er)? I've already replaced my plugs myself about 8 months ago.

 

Basic tuneup is the plugs, PCV valve, air filter, fuel filter, oil change, and checking your fluids and stuff. I also consider cleaning your throttle body & IACV as a part of the tuneup.

Also, use SeaFoam (get 2 cans):
1 can for fuel tank
1/2 can for oil (pour it in and change your oil after a few days of driving or something)
1/2 can into your brake booster hose (http://forums.maxima.org/showthread.php?t=308576)

You can also replace the coolant or tranny fluid. There is info on this stuff in the "How To" thread at the top or check the "Fluids and Lub" forum

 

i just got it back pulls harder then before and it cost me 77.00 i know the guy so he cuts me some good deals

 

what are the PCV and IACV vales? and where are they? and how do you clean them? the how tos didnt have anything on teh PCV and the IAC one was pretty limited.

 

It's in the how to
PCV valve: http://web.archive.org/web/200111091...k_service.html (link from How To thread) or http://forums.maxima.org/showpost.ph...4&postcount=38 (from FAQs)

IACV: http://forums.maxima.org/showpost.ph...27&postcount=2
The IACV is the metal thing next to the TB. It has 3 connectors on it (red/pink, brown/gray, and purple). You can see it right above the hand in this pic:

 

Do it all yourself.
It will give you a sense of accomplishment and you will save some money.

BTW, you will feel a difference when you tune her up.