Pardon if I get any terminology wrong--I'm not an expert in this stuff (more of a computer geek myself). Anyways, here's my issue: sometimes, on (somewhat) hard acceleration in manumatic mode, I get sudden power drops, primarily in 1st gear but sometimes in 2nd and 3rd as well. This is in my 2006 5AT Sedan Sport with about 5500 miles...

For example, yesterday, I needed to get around a Honda Accord (!) to exit the Pacific Coast Highway in Malibu, CA onto Malibu Canyon Road. From a dead stop, I accelerated rather briskly and of course was leaving the Accord behind, when at around 6000 RPM's the engine hesitated. Actually, I'd say it almost stalled, and then it suddenly started to rev again and then I shifted into 2nd. From there, everything was normal. Again, this has happened on other occasions, and in other gears, but always on relatively hard acceleration.

Probably not the best description, but there you have it. Any ideas?

 

Maybe it was your VDC kicking in. I also heard of people getting their fuel cut off by the system for some other reason.

 

Sounds like the rev limiter kicking in early. Maybe your tack is off.

 

I've had this happen on my car before under hard acceleration. I thought I had some bad gas. Are you running 91+ Octane?

 

if you have bad gas...air out your cabin by opening your windows LOL JK

 

When it began to stall, did the revs continuing going up but the car was not pulling anymore? As for the comment about the tack being off, they are and have been grossly off IMO. It seems Nissan used the same 3rd graders to calibrate the tachs in these cars as other VQ 3.0 and 3.5 applications. My 06 auto shows 7100 as the rev limiter but I know it is below that since I have not had any type of ecu flash. I am not also one of the types to believe that mine has a magicly higher rev limiter.
The reason I posed the question above was by the description it almost sounds like the tranmission is slipping. But if the revs stopped climbing then I doubt thats it.

 

Don't think it was the VDC, at least there was no reason for it to engage. This was on a straightaway on dry pavement, no reason for slippage.

I'm pretty sure that it's not "just" the transmission slipping, because as I recall the engine definitely bogs down. At least, I don't recall the engine _revving_ at that point.

I'm running 91 octane, highest I can get in Cali. And it's BP, so that should be fine.

Regarding the rev limiter, shouldn't that cause an upshift rather than cutting out the engine?

Looks like she'll have to go to the doctor. I'm a little embarassed--she almost got beat by an Accord!

 

Something definitely isn't right. I've taken the RPMs all the way up to redline in manual mode without any issue whatsoever. Gave it full power off the line and it didn't cut out at all. I think a trip to Infiniti may be in order.

 

Our cars don't automatically up shift when we are in Manumatic mode. So it could have been the rev limit, or VDC. Try turning off the VDC the next time you have a hard take off.

 

definately sounds like you tagged the rev limiter, just have to shift a little sooner. I've noticed that the 1-2 shift in manual mode is a little tricky when going WOT. You have to watch the tac and up shift at around 6000 RPM's, then you'll shift by about 6500 and just miss the limiter. Actually at the drag strip I'm keeping it in auto mode until after the 1-2 shift, then doing the 2-3 myself, for some reason that has shaved a good .2 off my 1/4 mile.