Posted a few times a while back about this problem on here, and it just comes back worse. When accelerating, something happens where it just stops at 2.5k rpms..and even floored, won't go past 2.5-2.7k..and sorta just alternated quickly back and forth between these two. Two times I've brought it into Nissan for this, and two times they've replaced the EGR valve which has something to do with recycling uncombusted fuel.

Lately now, I find my engine just being weird, and jumping around some, and not only that, but I change my oil regularly with Mobil 1 full synthetic..and over xmas break, I noticed the smell of gas pretty evident in the oil I was taking out. It wasn't overpowering, but there was defintiely some there. Just a week ago, I changed my oil again, and sent a portion of it to BlackStone labs for testing to see what they find. Now 2nite, this whole thing with the 2.5k rpm thing happens twice, and sorta violently. What's wrong with my car? Please help me. Someone once said the TPS maybe, but that would have less to do with the engine. Does anyone else have this fuel smell in the oil? Are the seals on my pistons shot? Is a fuel injector malfunctioning and dripping fuel into the oil?

Anyways, if ANYONE can give me any ideas, I'm going into Nissan tomorrow at 7 am, and saying that instead of just replacing what that check engine light tells them to replace, they need to look more into the problem i describe, b/c with two tries..it's still broken, and I only have another 4k miles till i hit 36k, although isn't the drivetrain covered longer? If anyone could give me any info please, I want to give these Nissan people as many hints as to what could be wrong since they obviously can't fix this or are too lazy who knows. Hopefully I'll get those results from blackstone back soon. Thanks!!! I love my Maxima, but a year of this crap is starting to **** me off!!!

 

How long do lemon laws apply??

-Tom Z.

 

if they can't fix the third time.... use the lemon law on them... if they can't fix it three time... they will have to give you a new car.

 

Correction. After the 3rd time. Write a Letter to Nissan Corp. Give them 15 Calander days to fix your car. IF Nissan Takes no Action, have your Lawyer file a Lawsuit. Make sure you Do the Mail Certified and have someone sign off on it. Your clock starts when Nissan Signs off on your letter.

 

Sorry to hear about that. It's gotta be extremely frustrating. If I'm not mistaken, I don't think it'd be your piston rings. If it were your piston rings, I would think you'd be burning oil.
Do what they said about the letter etc. Hopefully it'll work out to your advantage.

 

It varies by state. I think there are still a few states that don't even have lemon laws.

 

Well, I have an idea.
I had a pretty bad hesitation problem (3500-4500RPM) that took many trips to the dealer for them to fix. They finally had me drive it while their mechanic watched a real-time on-board diagnostic computer while I got the car to hesitate on the freeway.

What they found was that the ECU was retarding timing, always around this RPM range and only when it was hot out. It retarded timing because it "thought" the throttle pos. sensor was closed even though TPS recorded 3/4 throttle.

The ECU was bad and Nissan expected that answer. They are aware that there are faulty ECUs out there, but insisted on 2-3 ECU reprograms and a new TPS before they’d admit it. It sounds very much like you could have one of these faulty ECUs. See if they can do the ride-along diagnostic. As soon as they saw what it was doing to my timing, and that the TPS was reporting full-closed while I was at 3/4 throttle, they ripped that sucker out. My car has run perfectly ever since.

Just a thought because some of the symptoms are similar. Good luck!

 

What you describe is pretty interesting. Supposedly today they did the diagnostic test while driving, but didn't experience the problem. They are keeping the car and going to give it another shot tomorrow morning. Only thing I can say, is that the next time it happens, I'll be driving over there without turning off the car...obviously at a slow rate since I'll be driving under 2.5k rpm...and if i have to..keep the darn car running all night long till someone shows in the morning to see what I'm talking about!! Thanks for everyone's input..this has just been so frustrating. You all are the best!

 

Sounds like bad gas. My dealer could "accurately diagnose" similiar symptoms.....add some DryGas/FuelInjector additive once your at about 1/4 tank or less, then put in some Chevron

 

same thing happen to my car and brought it in to the dealer and they changed the maf sensor...i dont know if its the same thing as ur car but it runs fine now...

 

I'm having the same problems on my 01 SE auto as well. This has been going on since they swapped in the new tranny (@ 10k miles). Anyway I told the dealer that I hear a small vacuum leak bet 2200-3000RPM. The shop foreman also heard it but wasn't sure if that was "normal". He said he needed to hear another 2k1 to compare. Anyways, the car has no power in that range. Hyundai's are pulling away from me from a dead stop. Definitely feels like a problem with the TPS or possibly ECU. Dealer says no problems since no check engine light So just wondering if your car threw any codes or not???? Sorry for the length.
PS: Should I just suggest to the dealer that they do a ride-along diagnostic??
Thanks for the insight.