2000 Maxima Engine V6 , Car is running like crap!

[turbopugsleylx]

Hey Guys,I am working on my friends car for him, I am a domestic kinda guy so my knowledge of these cars ins and outs is somewhat limited, though I do know alot about the different sensors and the inner workings of the car do and what can cause what, but with this I am stumped.......

My friend has a 2000 Maxima V6, here is the symptoms of the car, his car bogs horrible if you give it anything but the lightest gas, it will rarely go abovw 30 MPH or so and if it does it is a struggle getting it there.....when you press the gas down it bogs and doesnt even rev or increase in rpms, and when you let off the gas it bucks(right near the pedal level when it runs ok in the first place at ,just slight application...

Heres What we have done so far and I was hoping to shed some light on this, cause he has been to three nissan dealerships and they cannot figure it out.....

We have replaced the :

Catalytic ConverterThe PCV valvenew spark plugs, I pulled out the MAF and cleaned it with electronics cleaner and put it back inI ran Seafoam thru the vaccum system, gas tank, and crankcase to break loose and clean out any gunk in the engine comb chamber or anywhere else........considering the PCV valve had lots of carbon buildup on it.... (this product cured the problem I had very similar to this with pinging on my 94 tbird V8.

Still after all of these no change...

I need some direction on what else I can do and where the heck to start cause I am stumped

What are the symptoms of a mass air going bad?What about O2 sensors?

Any other ideas would be appreciated...

[InsanityInc]

sounds like your MAF is screwy.

Unplug the MAF and see if it runs any differently. If not, try cleaning the MAF.

[elwesso]

sounds like your MAF is screwy.

Unplug the MAF and see if it runs any differently. If not, try cleaning the MAF.

I agree, good place ot start... If it runs better seemingly with the mAF unplugged, then buy a used one from the classifieds

[turbopugsleylx]

guys call me an ididot but I could not figure out that maf plug, i got so frustrated with it I wanted to yank on it, how do you unplug that thing and what is that green tab with the arrow on it for I spent 15 mintues trying to figure that thing out!

[elwesso]

if your plug looks like this



Theres a metal clip thing you have to remove in order to remove, it prevents the connector from coming off.

[turbopugsleylx]

the engine bay i am working on does not look like that at all its a Front wd v6, it is a smoot black tube with one sensor on it that is long.......

[turbopugsleylx]

Well we unplugged the MAF and he said that the car did run better and had more get up to speed power but still bogged when gas applied anymore than ever so slightly.................could this be it?

[elwesso]

Have you checked fuel pressure? If that turns out ok the MAF is suspect.

[turbopugsleylx]

I tired to figure out how to test the FP on thse cars with my FP gauge and tester, but it doesnt seem as plug and play as my mustang is, how in the heck do you do that on these cars? Also how do i reset the pc on these cars after I install a new maf?

[InsanityInc]

You have to get a t-splitter to test the fuel pressure.

However, if the car ran the same/better after unplugging the MAF, that's definitely your problem. I wouldn't recommend even bothering with the fuel pressure for now.

[NISTECH]

You have a bad MAF. Very common on the 2K max. You need to replace it with an updated maf. New maf is about $120. Thing is the ECM needs to be reprogrammed with the consult inorder to accept the updated maf. I have done probably hundreds of these by now.

A little side note on the connector hes reffering to. If any of you have ever come across these connectors you know what hes talking about. The trick is to first slide the green area down into the connector and while holding it in its downward most position push in at the arrow he is mentioning this will release it and you can simply pull it off. Once its off the meter it will stay in the slide position till you put it back on. At which point it will snap back up.

[turbopugsleylx]

this is the maf we just purchased

http://cgi.ebay.com/ebaymotors...ZWD1V

how do you do the reprogram, or where do you take it?

[InsanityInc]

well, if it's the updated design, a dealer will have to reprogram it with a CONSULT tool. If it's not the updated design, then you can just plug and pray.

[NISTECH]

I dont know if its correct or not as the part# they have posted is not a nissan part#.