I got a 1999 Maxima with 207k on the odometer (I've owned the car for 6 years now) and some time ago, this started:

So lets say I'm doing 70mph on the highway, and then I go from 5th gear to nuetral (so the car can go back down to idle) the car will die. It should stop on it's own at idle (500-600) but doesn't. The idle however, is perfect. NO actual idle issues, only it dies with having it in gear to not having it in any gear. This issue used to happen about 7 out of 10 times. Now that I'm turbo'd, it happens everytime. This issue was from before turbo. I'm also running 00VI in my car, but this issue was wayy after that upgrade.

This link is the closest I could find to my issue when searcher the org.
http://forums.maxima.org/5th-generat...odes-help.html

anybody got any other ideas, being that the link above is about 8 years old...lol

Thanks

 

What IACV are you running in your VI setup? How many and what size vacuum ports on your 00 UIM?

 

Easy fix, leave it in gear until you come to a stop.

 

Reminds me of......A man goes to the doctor and says, "my elbow hurts when I do this". The doctor says, "Well, don't do that. Then your elbow won't hurt"

My guess would be some sort of vacuum leak.
When is the last time you cleaned the IACV and TB?

 

When one of my 02 sensors died, mine did the same thing every time I would put in the clutch with RPMs over 2800. It through a code. I'm assuming if that was your problem it would throw a code also. Thought I would mention it in case there is no code.

 

@Nismo Pilot, it's the 5th gen IACV, not sure of port sizes

@njmaxstld, easy fix would be to find out the problem and correct.

@wizard, I thought the simple solution would be to check all my lines, but as stated before, I had this problem before turbo but way after 00VI set up. I have an A/F gauge (purrs nicely at idle at 14.7), it has been a while since I've cleaned my TB to be honest, but I know I've cleaned it twice since I've had the car. I got to replace a coolant line which requires TB removal, so I'll clean it again I suppose

@Finkle, I have never thought the o2 would be a cause?? I'll do some research on it.

 

Also might I add, when is not warm yet, that problem is basically non-existent. Only when the car is fully warm.

 

So if you shift from 4th to neutral, 3rd to neutral, 2nd to neutral or 1st to neutral....it doesn't shut off? I'm sure since you stated you're turbo'd you have some kind of aftermarket program and to me, since I've seen my datalog sheets on my cars the deceleration a/f ratio goes extremely lean during throttle lift and deceleration as high as 20 to 1....and maybe you are going to lean or too rich during throttle lift and deceleration...and need to go make some more adjustment in your program!

 

Well, this was happening before turbo. Also I'm running emanage WITH anti-stall...my a/f doesn't go below 11 under WOT. And yes, every gear it will die (was just using 5th gear as reference)

 

I didn't believe it until I changed them out. The front one died completely and it was ruining very rich. I could smell gas once it warmed up. Basically the ECU ran the front bank like it was cold all the time. When I let off the gas the front bank pretty much smothered itself out with gas, leaving only the rear three to keep the car running, which was not enough. Changed both 02s out, good to go.

 

i had something similar for a while - it ended up being the maf

 

Measure your O2 sensor's resistance once warmed up to temp...If all looks good according to spec change your MAF sensor....GL...It's something simple!

 

Did your MAF throw any codes??

I do have a z32 MAF sitting here at home....may be time to upgrade, plus more boost

 

It's the MAF 90% of the times. Get a couple from your local JY or one of the org members and you will be OK.

 

It's the MAF 90% of the times. Get a couple from your local JY or one of the org members and you will be OK.

 

never had a maf code

 

Sounds like the iacv is not working right. Google dashpot, its an old carburetor term, but modern EFI still performs the same function.

There is not enough air to keep a fast spinning engine running.

 

Sounds like you need to retrace you 00vi install.
Iacv wired and plumbed correctly?

 

@asand1, call me out if I'm wrong here, but had it been due to my 00VI set up, wouldn't it have been initially after it was installed?? This issue may have happend about 6-8 months later.

@Kevlo911, what would your car do with your MAF issue? My idle is peferect. I have unplugged the MAF in idle, and it goes all groggy...lol

 

That Aeromotive FPR, is it adjustable? Maybe it needs adjusting. If u had an OEM FPR I would have suggested replacing it.

 

It's just at new as Turbo set up, this issue I'm having was prior to that.

 

it would idle OK

it would turn off at street lights randomly - it would turn off while cruising when i had the clutch pressed in

 

OK. As Finkle suggested above, how old are your Primary O2s? If you've never changed them, change them. They get tired and don't throw a CEL. When they get tired, they no longer rapidly adjust to changing conditions in the exhaust.

 

What's you're AFPR set too?

 

My camera sucks ballz.....haha but here's a quick vid of what it does.

 

How's your MAF and FPR?

 

Maf

 

I have a z32 maf sitting in my backseat...lol glad I got some feedback.

Will give the new maf a shot when I get time.

 

So did you ever diagnose your culprit....????

Just FYI...... I have nistune, V-2 15psi, 550cc, Nismo adjustable FPR and z32 (had emanage blue) and I have been throwing a p0136 code for a while.... anyhow I haven't done any tuning with the exception of Idle and closed loop, I am running really well there..... and 8-1 under boost.... the car has been driving well for about 3 weeks... something of note when I watching the ecu consult in nistune my primary O2's are on-off-on off they are not staying steady..... my rear after cat o2 has an o2 sim on it.... to note I just put that in yesterday and after driving the car for about 15 minutes I had the exact same thing you describe

Anyhow yesterday the car died just as you are describing.... I messed with the tune etc... and just sitting in the garage and running the car up to about 3000 and chopping the throttle the car goes far below idle and almost dies... then idles fine... I am going to work on adjusting the IACV and I just ordered new primary O2 sensors...

I'll post up my results....



Update: Just hooked up nistune and followed IACV EC-32 and my idle adjustment was ran all the way down... I disconnected the TPS and adjusted the idle....to right at 800-850 all said and done......anyhow just drove the car for about an hour and no more stalling as described by the above... however my timing is still bouncing 5-11 at idle... I am working my timing tables and gonna hook up timing light and check the actual engine timing......I also believe my 02 sensors are tired... the car has been sitting for 6 years and I am going to change the primary o2 sensors.... disturbingly though I am still getting p0136 for the rear o2 even with the o2 sim and the spacer. I am going to order a new rear o2 as well as it may have issues.....

just fyi I had the engine removed for 3 years and I have checked every wiring harness for continuity and the sensors all of them have been ohmed/checked as per the manual... so those are eliminated the only sensor not checked were the o2..... I have an innovate wideband for tuning. hope any of this helps others.... also I was unable to get my idle down 525 rpm as the manual says.... I am still working this and will update you all