i need help determining what is wrong with my car, i will do my best to describe the problem...

it is a 2000 automatic adn about half the time, when i put it into drive or reverse it starts shaking as if the engine is about to die out. when i give it gas, the car takes off slowly as if it has a 50hp engine under the hood... but then sometimes it goes back to normal all of a sudden. gets a boost of power after around 2500-2700rpm. does anyone have any idea what the problem might be? thanks

 

Number of things...dirty TB, dirty fuel line/filter/injectors, MAS going bad...

 

could it be my VIAS?

 

sounds like it could be the MAF , no SES lights or anything?

 

i do have an SES light and i am planning to get the codes pulled up on wednesday. how much does a MAF usually go for sale? thanks guys

 

seriously man, this is gonna sound silly but just for ****s and giggles...check and make sure the mafs is plugged in..
-Brian

----i had the same problem with my 95 and its cuz i left it unplugged on accident.

 

between $75-$100
get in contact with Dave B

 

yeah, i did check it a few times adn it seems to be plugged in alright. the weird thinng i do not understand is why the car drives like **** only approximately half the time. i just came back from school, and i obviously drove there, and the car worked fine... no shaking no nothing, the SES is still on though... i mean if a MAF was gone, wouldn't it make sence for the car to drive like crap ALL THE TIME not on random occasions. i cannot notice a pattern in the switches from normal to crappy driving. sometimes i start it up, adn from the moment of the start it shakes like hell, but on other occasions, it works as smooth as a swiss watch. in some cases it swtiches back and forth during the drive... damn, dunno what to do, gotta pull those codes... thanks guys


and btw, who is DAVE B?

 

Dave B is the parts manager at southpoint nissan he gives us orgers a discount, look in the sticky's for his number.

 

no, for some reason the MAF can fall in and out over the sensible range... a fluctuation, really.

could also be coils. a secondary ignition misfire will show itself moreso under load, and when you get at a higher engine speed, less load, the misfire goes away and you have a car again.


get the codes pulled

 

Autozone pulls the codes for free. If it's a coil, they'll even tell you which one.

 

$100 says its the MAF.
if someone takes the bet, i'll give you my address to send me my money

 

What do you know about the 3.0? You have a 3.5

 

I have a CAI on my car so i really think that it is the maf. i drove with that intake all winter (well, a california winter) and been through a few thunderstorms on freeway with it. i would not be surprised if that sent my MAF south... thanks for the input guys... love you all (in a straight way)

 

as a matter of fact i do experiance a bad shaking when the car is under load accompanied by a disgusting power loss. as soon as the autotragic downshifts, and rpm go up, the car almost wants to burn rubber...

 

MAF.....


DaveB..is kinda like...your daddy

 

Agreed--get the codes first and post them here. Lots of us have 2K's and have struggled with performance because of parts going bad but not completely failing. The MAF is a tricky beast if it's still measuring, but just not measuring correctly. With my Vette, if I fail the MAF using tuning software the car switches to the low octane table and runs in SD mode. Runs fine, just less advance and fueling requirements rely primarily on MAP and a lookup table. I would think the Max does something similar--with a hard failure. What I would give to have a version of HP Tuners for the Nissan 3.0 so I could find out!

For grins, has anyone ever mapped out the Max MAF curve using scanning software and compared it to what the PCM has?

 

What?? I wish Dave was my dad, do you realize how well tuned my auto would be!
But seriously, Dave is the guy to call for your maxima part(s) inquiries.

 

the p1320 that the 5.0gens are plagued with wont specify which coil

 

I'm going to halfway hijack this thread because I just remembered to ask this question...does it matter where your MAFS is in the airflow stream? Because I think when I made my home depot WAI for my max I had it in such a way that I had to reposition the MAFS closer to the TB...does it really matter?

 

Everything I've read indicates the MAF should be closer to the intake than the throttle body.

 

Got Codes ?

 

edited. intake=intake manifold.

plz dont confuse ppl by calling a cone filter an intake