Fault code PO171 system too lean

[slideways...]

[Chiquae07]

i think he needs some HKS blinker fluid for his eye-lids

[nismo_pilot]

naw naw naw...... he needs STAGE 3 BLINKER FLUID from hks..... stage one just wont hold up to his abuse

[nissandoc]

scratch that last one, that was the beer talkin'.
how about a role call guys? do you actually work on cars for a living? if so, how long? any certifications? what kind of experience do you really have? and why do you guys think that the more post's, stars, smiley faces or whatever makes you smarter. i,ll go first. so dont puss out.
2 yrs trade school, 7 yrs in the army working on anything and everything, 2 yrs at independent shop, 12 yrs at nissan dealer. ase certified master for 10 yrs, nissan certified master for 4 yrs. so lets hear from you slideways, nismowu, chiquae07. lets be honest now. and the fuse thing is getting old, i just have a habit of checking them before i spend 30 minutes on something only to find a blown fuse. and all the insults back and forth is fun and all, and kinda entertaining, but we arent getting anywhere. slideays please entertain yourself and ask one of your buddies at the dealership if an intake leak will cause it to run rich or lean. rich is fuel, lean is air. ffwv has already replaced the o2 sensors, so lets asume that we rule that out. what else will make it run lean?

[slideways...]

plus, a leak in the intake would make it run lean under load, sure, but this guy is complaining about a rough idle, and only on cold start. back up and think about this for a sec. i dont care what certifications you have i care what you know.
btw ive worked in a shop for 1 year and im going to college for auto mechanics. not much but im only 23 so i cant have as much time in a shop as you. but i know now that im smarter than you so all this experience you have doesnt mean shit.

[HogieGT-R]

hey guys chill the fuck out...rather than beating each other over the head with how much experience y'all have, how about just giving the guy some ideas? if you haven't noticed, the guy hasn't really responded since this whole flamewar happened...chill out

[eastwood]

nissandoc is right /do not listen to know it all young punk
im a nissan tech for 25 years . air flow meter will correct
problem with your car

[Chiquae07]

i really dont have muc, but i asked my neighbor since he is always fixing his cars since he beats on them, but he said a rough idle in the cold could be a O2 sensor, leak in the intake, and i couldn't ell what else he said. i dont think it woulda helped if i told him it was a nissan since he is a ford/domestic guy, but cool about everything. if it is anyone that will help me with my vq35de swap, it would be him...

btw, its not genuine chevy lights unless it has LOF on it i think its LOF...

[slideways...]

ok well if he is right ill admit it, since he stopped being an ass. but i dont ever remember him saying the MAF was bad...

other than that, any more argument and conjecture is pointless without results.

see im not just another knowitall punk. i didnt know how to even change my own oil 4 years ago. the amount that i know right now is more than many mechanics out there. im close to knowing enough to pass all my ASEs right now with only 2 quarters of school ever. at my shop, i constantly make over flatrate and sometimes more than some ASE mechanics there. dont doubt just because im younger than many people that my knowledge is lacking. and i also dont have the pride get in my way like some. i will admit if i get proven wrong here like in every instance. my only problem is that if someone is a dick i wont respect their knowledge since its not being applied in a constructive and positive manner. thats all.

[nismowu]

Originally Posted by nissandoc

scratch that last one, that was the beer talkin'.
how about a role call guys? do you actually work on cars for a living? if so, how long? any certifications? what kind of experience do you really have? and why do you guys think that the more post's, stars, smiley faces or whatever makes you smarter. i,ll go first. so dont puss out.
2 yrs trade school, 7 yrs in the army working on anything and everything, 2 yrs at independent shop, 12 yrs at nissan dealer. ase certified master for 10 yrs, nissan certified master for 4 yrs. so lets hear from you slideways, nismowu, chiquae07. lets be honest now. and the fuse thing is getting old, i just have a habit of checking them before i spend 30 minutes on something only to find a blown fuse. and all the insults back and forth is fun and all, and kinda entertaining, but we arent getting anywhere. slideays please entertain yourself and ask one of your buddies at the dealership if an intake leak will cause it to run rich or lean. rich is fuel, lean is air. ffwv has already replaced the o2 sensors, so lets asume that we rule that out. what else will make it run lean?

I'm still in kindergarten....feel better now?

anyway, is P0171 the only one code that he has?
cause that's just for the bank 1, which I think it's still O2 sensor.
Maybe he bought a defected one, or he got the wires mess up maybe?

A bad MAF sensor should cause both banks run too lean, not just one.

[eastwood]

hey guys also check to see if you crossed up o/2 sensors connectors when you installed them / if so car will run very bad //

[ffwv]

I will check the air flow meter, once I find out where it is and how to check it. It could be that one of the O2 sensors are hooked up wrong. I didn't do the work, they were done by the used car dealer that I bought it from. Thanks for the ideas!!

[nismowu]

Originally Posted by ffwv

I will check the air flow meter, once I find out where it is and how to check it. It could be that one of the O2 sensors are hooked up wrong. I didn't do the work, they were done by the used car dealer that I bought it from. Thanks for the ideas!!

The sensor is between the intake box and the throttle body.
Very easy to find, it's connected with a 4 wire harness.
To do a basic check, start the engine, keep it running at idle speed
under warm-up condition.
Now the voltage of the green wire on the MAF sensor should be
approximately 1.3~1.7V
measure it again with engine running @ 2500 rpm
it should give u approximately 1.8~2.4V

[nismo_pilot]

anyone think mildly clogged cat? They dont work properly until at temp which is why the spec v has a precat to filter emissions during the cold period 0-15 minutes after starting..... this may explain why his AF mixture is screwy during startup but evens out when at temp........