I have 126,000 miles on my maxima and I have never changed the PCV valve or the fuel filter; how can I tell when these "NEED" to be replaced and what can I expect to gain when they are replaced. The car is driving wonderfully thats why I haven't been able to find a reason to replace these items even though I'm sure I have exceeded the recommended maintaince interval. Why replace them if the car is running fine?? TALK TO ME GUYS

 

thses are to prevent future damage. i just did mine but watch out for the gromment on the pcv valve DON'T LET IT FALL IN . like what i did lol.

 

You have 126k and are on the original fuel filter?!? My friend, change that thing NOW.

The PCV valve is a different story. They are usually pretty reliable.

 

Changing that fuel filter should be the first thing you do tomorrow morning. I'm actually impressed the car still runs okay, those filters should be changed every 15-30K.

 

i'd change both every 15-30k miles. good preventive maintenance. if your car is still running good on your original fuel filter, consider yourself lucky!

 

if you have an SE or non limited version, try to hit your top speed....if it stops at about 115, probably even less, your fuel filter is clogged

 

I'll put my foot to the floor tomorrow and post results. I'm well convinced now to change both PCV Valve and fuel filter; that's an inexpensive route to preventive maintenance and possibly a tiny bit more fuel efficiency. Thanks for all the posts; this is a great forum.

 

To truly test the fuel filter you'd need to be able to regulate the
pressure of the input and measure the flow on the output. The much
simpler solution is to just change it at the recommended service
intervals.

The PCV valve is easy to check. When you take it out and shake it,
it should rattle. Sort of sounds like a can of spray paint with a
mixing ball. If there's no sound then it's no good. For what you
go through to take it out and what it costs to replace it, you might
as well just put in a new one given the amount of miles you have on
your car.

 

Well I changed the PCV valve and the air filter today, purchased the fuel filter but I'll replace it on a day when I have more time and patience That @#$ Fuel filter is in a not so nice position and the clamp are held tight by screws, I'll need to shrink my hands anbd become a contorsionist to get at them but I'll get it done some how (with great dread )
[QUOTE]Originally posted by joaquink


To truly test the fuel filter you'd need to be able to regulate the
pressure of the input and measure the flow on the output. The much
simpler solution is to just change it at the recommended service
intervals.

The PCV valve is easy to check. When you take it out and shake it,
it should rattle. Sort of sounds like a can of spray paint with a
mixing ball. If there's no sound then it's no good. For what you
go through to take it out and what it costs to replace it, you might
as well just put in a new one given the amount of miles you have on
your car. [/QUOTE

 

what is the best fuel filter to get for the 4th gen. I was thinking of gettin it at the dealer

 

I just changed my fuel filter , and it was so old that the tubes were really stuck, yours will probably be the same way. Dont be afraid to be agressive with it and if it is really stuck, take a flat head screwdriver and slowly pry off the tubes. Also, it helps to move anything around it just to get it out of the way. good luck

 

'96 300zx oem only

 

This bad boy is a ZOMBIE....holy moly...

 

Andrei, wuts the difference between the 96 maxima fuel filter and the 300zx fuel filter? Will i have any problems or space problems installing it in there or its just the same as the maxima filter

 

about 2 times the size, last longer. Its all in the FAQ I got mine from car quest. OEM spec, we use them all day everyday when doing SR20DET swaps at my work, so no problems with quality there.

 

i just changed my fuel filter at 335000km's i dont think it was ever changed b4 because i couldnt c it in the records from the first owner... i'm the second owner... and wow changing the fuel filter was a big difference... flushing the rad makes a huge difference too. where exactly is the pcv valve? is it inside the rubber pipe?

 

PCV yes inside the one near the TB, undo the clamp and slide the hose off, use needle nose pliers - this is also in the stickies under the 60k Mi service

about the fuel filter : what Tai Mai Shu said !!!

 

i kno im sounding like a pain in the a$$, but im gonna go get the 300zx oem filter tomrrow, but just wanted to know if i will need a new clamp or something to screw down the bigger fuel filter or does it fit right onto the old clamp of the old filter

 

http://www.autozone.com/az/cds/en_us...rInfoPages.htm

Quote:
i just changed my fuel filter at 335000km's i dont think it was ever changed b4 because i couldnt c it in the records from the first owner... i'm the second owner... and wow changing the fuel filter was a big difference... flushing the rad makes a huge difference too. where exactly is the pcv valve? is it inside the rubber pipe?

 

If the fuel filter and PCV valve have never been replaced, I wouldn't want to hazard a guess as to what condition the throttle body and IAC valve are in.

 

the fuel filter we just changed on my friends 1998 80k miles.. prob did not need it. the pcv valve looks new. in the nissan manual it does not say when to change the fuelk filter. i guess it would not hurt. pain in the a s s we used pliers and a butter knife

 

I changed my fuel filter recently, try a 5/16 or 3/8 open end wrench wedged between the end of the hose and the fuel filter to pry off the hose.

 

[QUOTE=fflan513;931139]Well I changed the PCV valve and the air filter today, purchased the fuel filter but I'll replace it on a day when I have more time and patience That @#$ Fuel filter is in a not so nice position and the clamp are held tight by screws, I'll need to shrink my hands anbd become a contorsionist to get at them but I'll get it done some how (with great dread )

Take all the intake tubing out of the way including the airbox. Once you have all that out of the way you should have more room to get to the fuel filter. I suggest pulling the fuel pump fuse and crank the engine to relieve some of the pressure from the line before disconnecting the filter. Also check that throttle body, might want to clean that too. Good luck

 

No, the inlet and outlet size on the 300zx filter is the same size as oem max filter, its bigger but mine fit into the clamp on the side wall perfectly and has not moved from there for about half a year now...

 

can i do away w/ the clamps? for the pcv? i've used my own hose and its a bitc.