[Gundam02]

Ok, so I was messing around and I took the car to 100mph and then slowed down fairly fast 100-20 in about 75-100 yds, and the engine died. So basically I was like WTF!!! So I started it back up and did the same run, it almost died again, the check engine light came on, the tach bounced but once I let go of the brake the car resumed normal operation. What is going on????

I had over 3/4 a tank of gas, so what could be causing this?? The car did feel like it was out of gas, so could the long stop be pushing the gas away from the intake in the tank? I kind of find this disturbing as this is a sports car, how can I lose power going from a straightaway to a turn??

Has this happened to anyone else? Should I take it in to Nissan??

HELP!!!!

 

[dave079]

This has happened to me a few times along with many others when decelerating fast from a high speed. Do you have a popcharger? That has been the main cause of this happening. Something to do with the MAF I think

 

[Strat942]

What gear were you in?
Was the clutch depressed?
Was the TCS on?

Maybe you were getting enough rear wheel lock-up to stall the engine. Just a guess.

 

[TrackZ03]

Josh, something similar to this happened to me on the interstate shortly after I installed my Popcharger last month. If I'm not mistaken, I think you have a JWT as well.

I was going about 95 in 5th and had to brake pretty hard as I was getting off onto an exit ramp. I went from 90+ to about 20mph in a similar distance such as yours and noticed the tach drop down really fast as I went into neutral and applied the brakes. Once I hit about 20 mph, the tach dropped all the way down and the car shut off with the CEL light on. Scared the piss out of me since I thought the Popcharger was to blame or I somehow screwed with the MAF sensor.

I've tried to duplicate this a few times since and have only noticed that the tachometer drops pretty low (under the exact same circumstance) but once I blip the gas its fine.

Only seems to do this at very high speeds followed by hard breaking and/or going into neutral with braking. Regardless, it's not a very safe situation to be in and was wondering if I should take mine to the dealer as well.

 

[Gundam02]

Originally posted by Dave079@Nov 12 2004, 06:12 PM
This has happened to me a few times along with many others when decelerating fast from a high speed. Do you have a popcharger? That has been the main cause of this happening. Something to do with the MAF I think

You are the second one to say this about the MAF. Is there a fix?? Or do I have to go back to the stock airbox???

Thanks

 

[Gundam02]

Originally posted by TrackZ03@Nov 12 2004, 06:21 PM
Josh, something similar to this happened to me on the interstate shortly after I installed my Popcharger last month. If I'm not mistaken, I think you have a JWT as well.

I was going about 95 in 5th and had to brake pretty hard as I was getting off onto an exit ramp. I went from 90+ to about 20mph in a similar distance such as yours and noticed the tach drop down really fast as I went into neutral and applied the brakes. Once I hit about 20 mph, the tach dropped all the way down and the car shut off with the CEL light on. Scared the piss out of me since I thought the Popcharger was to blame or I somehow screwed with the MAF sensor.

I've tried to duplicate this a few times since and have only noticed that the tachometer drops pretty low (under the exact same circumstance) but once I blip the gas its fine.

Only seems to do this at very high speeds followed by hard breaking and/or going into neutral with braking. Regardless, it's not a very safe situation to be in and was wondering if I should take mine to the dealer as well.

Thing is if it has to do with the JWT then they won't fix it. Crap, this sucks.

 

[dave079]

Honestly I wouldnt worry about it too much. It has probably happened to me about 4 times in the past year. Its nothing that will really hurt your car. There is no real fix other than going back to your factory airbox. Im not sure if other intakes have this problem though. I have only heard of JWT doing this

 

[buzam]

you could always build an airbox around the JWT - http://jimwolftechnology.com/wolfpdf/POPCH...BOX_EXAMPLE.PDF

 

[smoothz]

Don't worry about your MAF or pop charger. I'm thinking it's like comparing that occurrance to a fighter jet having a stall.

That kind of sudden disruption in the flow of air and fuel will definitely throw your car for a loop. Think about it: All your fluids are pushed to the front. Your oil, fuel and maybe coolant are quickly displaced and not uniformly where they should be. That's like the g-forces F1 drivers feel when taking curves and corners. All the blood rushes to one side causing them to get slightly blurry vision or affecting their peripheral vision.

 

[cedusett]

Wow I hadn't ever heard that about F1 racers, but that's pretty cool.

I've had my pop charger for over 6 months now and this has never happened to me. I think it has something to do with the cars sudden loss of air, but as far as I know it doesn't do any damage. I woudln't worry about it.

 

[Zilvia]

weve hit hundred before but we uselyy have enough space to slow down gradually and not sundenlyy.....i dont thins cars are ment to do that.............but hey any thing can happen...Ill get her to try it some time

 

[TrackZ03]

Just be careful testing this as it is not a good feeling when your car stalls doing any kind of speed on a freeway. Be prepared to pull over and yell WTF.

 

[Gundam02]

I was actually messing around on a road with no entrances and about 3 miles of straight away, so there weren't any other car safety issues.

More then anything I plan to start racing the Z next season and if this is something that happens alot during hard braking it's not going to be good on the track.

 

[jetpilot718]

Maybe this effects only first year models (and first year ECU software). My 04' has had it's pop charger for around 5000 miles, maybe more, and never a single problem. Then again, if I need to do any heavy to moderate braking, I'm using the gearbox as it's meant to be used to brake the car..

Learn how to heel-toe people.. lol

 

[nismokid]

Originally posted by cedusett@Nov 13 2004, 10:52 AM
Wow I hadn't ever heard that about F1 racers, but that's pretty cool.

I've had my pop charger for over 6 months now and this has never happened to me.  I think it has something to do with the cars sudden loss of air, but as far as I know it doesn't do any damage.  I woudln't worry about it.

When Jeff Gordon test drove Juan Pablo Montoya's F1 car (BMW FW25), he said his vision was also getting messed up from the Gs experienced (like Smooth said). The F1 cars have 2.5 Gs under accleration, 5 on braking, and basically anywhere between those two numbers for lateral Gs.

 

[studybuddy]

Originally posted by NismoKid+Nov 14 2004, 08:37 PM-->

<!--QuoteBegin-cedusett

@Nov 13 2004, 10:52 AM
Wow I hadn't ever heard that about F1 racers, but that's pretty cool.

I've had my pop charger for over 6 months now and this has never happened to me.  I think it has something to do with the cars sudden loss of air, but as far as I know it doesn't do any damage.  I woudln't worry about it.

When Jeff Gordon test drove Juan Pablo Montoya's F1 car (BMW FW25), he said his vision was also getting messed up from the Gs experienced (like Smooth said). The F1 cars have 2.5 Gs under accleration, 5 on braking, and basically anywhere between those two numbers for lateral Gs.

Wow, that's a lot of really cool, really useless information. :thumbsup:

 

[Gundam02]

Does this happen with the stock airbox on it? Has this issue happened to anyone that DOES NOT have an intake installed on the car. This is something that is a serious safety issue because if you put the car in neutral on the highway and it dies you lose power steering and brakes. I am going to put my stock airbox back on the car and test it, but if I can get some corroboration on this it will help out alot. Especially if I have to take the car back to Nissan.

 

[dave079]

Originally posted by Redefined350z+Nov 14 2004, 09:50 PM-->

Originally posted by [email protected] 14 2004, 08:37 PM
<!--QuoteBegin-cedusett

@Nov 13 2004, 10:52 AM
Wow I hadn't ever heard that about F1 racers, but that's pretty cool.

I've had my pop charger for over 6 months now and this has never happened to me.  I think it has something to do with the cars sudden loss of air, but as far as I know it doesn't do any damage.  I woudln't worry about it.

When Jeff Gordon test drove Juan Pablo Montoya's F1 car (BMW FW25), he said his vision was also getting messed up from the Gs experienced (like Smooth said). The F1 cars have 2.5 Gs under accleration, 5 on braking, and basically anywhere between those two numbers for lateral Gs.

Wow, that's a lot of really cool, really useless information. :thumbsup:

Thats definatley some cool info. Leave it to Al for good useless info. But hey the useless kind is always the most interesting kind. :thumbsup:

 

[nismokid]

Originally posted by Gundam02@Nov 15 2004, 09:12 AM
Does this happen with the stock airbox on it? Has this issue happened to anyone that DOES NOT have an intake installed on the car. This is something that is a serious safety issue because if you put the car in neutral on the highway and it dies you lose power steering and brakes. I am going to put my stock airbox back on the car and test it, but if I can get some corroboration on this it will help out alot. Especially if I have to take the car back to Nissan.

I don't have any aftermarket intake system/filter and I have put my car in neutral at 75mph, never stalled. The RPM just went back down to idle. I've heard that the stock air filter will give you basically the best gains. G35 drivers usually use the Z intake, aka "Z tube."

 

[jetpilot718]

If you're using the "stock" filter, your not "gaining" anything lol

So tecnically, no. The JWT has been a tried and true method of freeing up a mind numbing 6 hp, but it sounds cool so who cares about the gain.

And I can put my car in neutral all day long at 75+, nothing happens. Revs drop to idle. Idle doesnt change at 0, why should it change at 100?