Scott Vincent Grissom

installed both right away and the car feels better, but in a way drives the same...maybe i need to buy MAF cleaner sicne i did get the part from a dismantler. The CEL read P0100 and P0325 together so i had the KS replaced and now the OEM factory MAF!! Im frustrated. Its been determined that the fuel pump is fine, and the pressure is normal. I thought maybe the TPS but I DO NOT wanna keep random guessing. Esp without a TPS code. Do not want to take it to the dealer :/ what else can i do

Scott Vincent Grissom

here is a video of how the RPMs drop. Its rarely gets above 2500. also at the end theres a shot of the breather hose (probably just needs to be replaced) as well as a random hose that I do not know what is for... and the odd sound of teh engine revving

http://youtu.be/C2bvMmzH4Mg

maxed_out_99

ok, so you mentioned that the fuel pressure is good. my question to you is, is the volume good as well? it may have enough pressure but not enough volume

so in essence the pump would be struggling to keep up with the demand for a higher load

if the volume and pressure is within spec we need to move to the next step.

check for vacuum leaks;
this is done easily with a can of intake cleaner/WD40 or any other combustible liquid in aerosol form

spray everywhere that vacuum would leak upper intake, lower intake, injectors, boots, tubes, throttlebody, you get the idea check for changes in idle

the hose you grabbed at 5:20 is the trans breather. its fine where it is dont worry about it

your car is real quiet and the windows were down it was kind of hard to tell.
did you hammer it at all?
what happenes when you brake torque it? (foot hard an the brake and hard on the gas in drive)

Scott Vincent Grissom

alright! I have my marching orders. I will do all of this tomorrow right after work thank you. and to add, I had the codes cleared (P0100 and P0325) and the car ran like a real champ! like it was brand new for about 30 minutes and then, the b*tch in it is back. No CEL though. OK I will report back thanks

Cielo

the rpms drop fast after you let off the gas??? not to sound daft, but.. is it an automatic?? are you sure its not just because you have the O/D button engaged and it's shifting into overdrive at unfavorable speeds due to you letting off the gas? An auto is designed to shift its gears when you do that. this is especially a common occurrence on automatics when going uphill with O/D button pressed-in.

by easing up on the pedal too much, your sent into the overdrive ratio (especially when your at the speed your car's transmission senses is enough for the current RPM), and since your not pressing down quickly (quick Vs HARD) after this happens you lock in the pressure, preventing an upshift. and it may seem sluggish because the car reacts to HOW you press the accelerator. if you tap down on it swiftly, but return your foot to a throttle position further than original, it should jump out of overdrive briefly and upshift, keeping your foot down after this will keep you locked into the higher ratio, and you'l accelarate... then simply ease up on the gas to re-engage final/overdrive to drop revs (flat land-cruising) BUT replace your throttle position to maintain the power/speed at the desired values...

i'm just hoping the problem can be solved by HOW you drive rather than what your driving with.. a free thought for a possible free solution.

Scott Vincent Grissom

UHHH....you're not being daft, let me look into that...mechanic stepped on the brake and gave it a little gas and the car didn't move, and it revved smoothly, he said that was a good way to test something like misfires. When he drove it, it seemed to drive normally, it went up to 6k RPM and we were just hitting 40MPH idk if thats normal. I am coming from driving a bmw m5 and I have never driven a nissan before so maybe I just need to get used to the different amounts of pressure to put on the pedal, I'm used to accelerating with my toes, and lately I've been driving my maxi with my sole and its been driving a lot better. I'm going to try and release the O/D uphill and see if there is a difference. I've been driving all around town without a CEL since I put in the new MAF. Dispite there beign to CEL they pulled a P0325 code KS bank 1, even though I just had it replaced...I'm thinking about giving it a tune up to fix the sputtering and intermittent rough idle.

And the fuel volume was tested to be A-OKAY....

maxed_out_99

M5s are monsters. It's like going from a lambo to a civic it's not going to feel that same.
Any vacuum leaks?

Scott Vincent Grissom

I feel like an idiot. No vacuum leaks. I've driven the M5 for the past year and a half and its a lot diff. figured since the ideology with the maxi is a 4dr sports car, i figured itd be the same. So no vac leaks and the RPMs issue was because of the o/d. So thats not a problem anymore. and it looks like that OEM MAF I installed shut off the CEL for good and its not dying anymore....this saga could truly be coming to a close....I do still have a sputter at idle sometimes, the rpm will sputter from 500 to 350, its like a bounce though, and it doesnt shut off and it goes away when I take off. the car may need a tune up? 221k miles and I dont know when the previous owner had the plugs swapped. heard they had to be double platinums but whatever. any ideas on the idle sputtering? oil levels and trans levels are good, coolant too

maxed_out_99

It couldn't hurt to replace the Plugs. I got coppers in mine you just have to change those more often.
As for the bouncy idle, did you ever clean your IACV? That could be that issue.

Scott Vincent Grissom

Yes I had the IACV cleaned and you're right, with 221k miles I will replace them this week. thank you all. If anything changes, ill be back

Cielo

damn near redline is not normal for 40mph. lol. most maximas driven properly accomplish 40mph in sub 1500 rpm on flat land.

glad you got it sorted. although your engine is long lived.

just curious.. how did you go from an M5 to an A32?? thats a strange and very steep jump. lol. especially if it was a mid-late 2000s model.

Scott Vincent Grissom

the M5 blew a head gasket, and then the motor froze. sold it for 1500, but since i still had owed 1300 on it, the dealership agreed to roll that balance over onto...the maxima.

But ok good to know...I will watch for that RPM/MPH ratio. It still was sputtering on idle in drive and sputtering at take off...but for some odd reason as soon as I put gas in, the sputtering stopped...

Amerikaner83

iTrader: (17)

Just out of curiosity, you're using Premium gasoline, yes?

dwapenyi

iTrader: (3)

So you're saying that your maxima acts up when low on gas but feels better when the tank is at least half full? Hmmm, I'm experiencing a similar issue and I'm slowly circling around the FPR as the culprit. I've done all the basic maintenance, plugs, air filter, oil change etc. And I just yesterday changed the fuel filter even though the old one still seemed fine. The strangeness is still there with the new fuel filter too.

DW

Scott Vincent Grissom

yes, and I've used lucas upper cylinder lubricant and injector cleaner. It usually only happens when I'm down to the quarter mark and lower. when theres about a half a tank its a lot less frequent...I'm taking it in to get new plugs....possible fix? No CEL, and sometimes when i accelerate, it chuggs a bit as if its having a hard time getting a steady flow of fuel.

Scott Vincent Grissom

FPR? I'm new to the Maxi world...lol