Okay, well first of all, I get the egg smell in my car. So I know that my cat needs to be replaced but last night I put my car in park and left it on and went to my trunk to get something, came back and I see the car turned off. So I start the car up, and it stayed on fine. Also, lately i've been noticing that when I am cruising, and I floor it or push gas in even half way, basically whenever it downshifts, the car lags. It doesn't move like it used to. My question is, could this be because of MAF? Clogged Catalytic conv? Anyone had any sort of problems like me?

Question 2 is, i'm gonna replace my MAF, do I need to reset my ECU if i get a new MAF? I read that new MAFs require ecu resetting..

 

I will change it soon, so Im wondering too.

 

I just had that same problem it was the maf as well as the filter needed to be changed. The dealer did mine under warranty.

 

and did he reset the Ecu??

 

And you have no check engine light?

 

I do get SES light.. and the only codes I get are for faulty 02 sensors. Now I am almost 90% sure that it's my cat that's doing this. But the confusion is, which cat is it? There's like 3 cat that stupid nissan put, how do I know which one is bad?

I just picked up my car , got new spark plugs, coils, rotors and pads done but the car is still SOOOO lazy at high rpms. UURRRGGGGG

 

Has your SES light ever started blinking while you were driving?

 

believe it or not it happened right in front of the tech and the first thing he told me was is the ses light on and it was not. I havent picked up my car to see if it happens again.

 

Nope, the SES light never blinks, just stays on for a day or two and goes away. But comes back after a day or two, it's like a cycle. The codes that I pullled were P0172 and p0175.

 

See my problem is that the car turns off on my at low RPM's like when coming up to a stop sign or stop light. Car just buckels and shuts off once i put it into neutral so i have to remember to downshift to 1st gear right before i stop (a big pain in the ***) and also like even stopped at a light or something it idles really low like 500 rpm and car shakes then it realizes and goes back up to like the normal 750 rpm then comes back down shakes like its gonna turn off then adjusts again and again and again - sometimes even turns off on it own like this.
Never had a check engine light come on or SES light with all this and it throws no codes which i dont understand.
I am so confused with this car guys, i dont know what to do

 

Those two codes mean you're running rich, possible causes include:

1)Primary 02s
2)Injectors
3)Exhaust gas leaks
4)Incorrect fuel pressure
5)Mass air flow sensor

I'd replace the MAF and see if the codes come back, then replace the front 02s(Black/Blue).

As far as being slow on the top-end, if you mean 5000-6400rpm, check your VIAS power valve.

 

Maximus, mine does the same thing...I have heard alot of possible causes but no one has said what the real deal is yet. If you rev my engine up in neutral and let it drop it drops way low and then to idle almost dieing. It has died twice on me while going around a corner trying to shift into first.

 

Check your maf wire and see if it's oily from your K&N.

 

Also, check this FAQ thread out:
http://forums.maxima.org/showthread....30#post1909170

 

Well, you're right. I just ordered 2 front 02 sensors. $190 from oxygensensors.com. If this doesn't fix it, i'll order a new MAF. Thanks alot for ur help Icey. I really appreciate it.

 

I'd have to say both 02s being bad at the same time is unlikely, so the MAF which controls the Air/Fuel ratio via the ECU to *BOTH* banks is more likely.

If you've got over 50K miles on the front 02s, then it's a good idea to change them anyways though.

 

I have 96k miles. I'm gonna change both 02s as well as the MAF. Thanks dude.

 

sounds like some sort of leak somewhere. max97stick had the same problem and we found out his manifold gasket was leaking so we tighten the bolts and the car ran fine from that point. you can take a quick check to verify if this is the problem by spraying throttlebody fluid around the intake and throttle body and see if the car surges if it does its sucking in air somewhere.and for both 02 codes to throw means it s something making them do that other than the 02 themselves. check for loose hoses or unplugged sensors or better yet check the 02 fuse for starters.

 

Where is the 02 sensor fuse located? I can check it when I get home.

 

im not sure in your yr but mine is located in the fuse panel under the dash on the last row to the left. it says 02 sensor fuse.

 

As a matter of fact, my stock intake box makes hissing noise when I drive as if I have a WAI. Weird but true, maybe that can be causing the 02 failure. Perhaps tehre is a leak somewhere in the intake manifold.

 

i say take it back to the dealer if the car is under warranty. Let them fix it.

 

Chill homie, i'm upto 96k miles on my car.. no warranty.. i'm on my own..

 

This definately sounds like an O2 sensor problem. I had the same problems with my old car, 92 Dodge Spirit. The car felt very sluggish and would just stall when idle.

 

I just ordered my 02 sensors, I should have them by Monday and prolly get them installed durin the week. I"ll keep you guys posted.

 

dude, i think they got it taken care of...back in 2005

 

im getting a p0175 on my 2000 max GLE . . . did anyone get a solution to the problem and would any1 that lives in brooklyn would consider meeting up and ming letting me borrow there MAF just to see if it makes a difference . . . ?

 

car stalls if i rev it in park or neutral . . . changed front o2s . . . neva changed bank 2 sensors and i have 113k miles . . .