Hesitation
#1
Hesitation
I've posted on this before, but I'm still experiencing this "problem". I experience momentary hesitation under hard acceleration in almost any gear (I have 6 speed 2k2). It's not all the time, just when I floor it or thereabouts.
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
#2
Re: Hesitation
Originally posted by Maxmann
I've posted on this before, but I'm still experiencing this "problem". I experience momentary hesitation under hard acceleration in almost any gear (I have 6 speed 2k2). It's not all the time, just when I floor it or thereabouts.
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
I've posted on this before, but I'm still experiencing this "problem". I experience momentary hesitation under hard acceleration in almost any gear (I have 6 speed 2k2). It's not all the time, just when I floor it or thereabouts.
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
If your car's in a gear traveling at about 2.5-3 rpm's and you WOT...it will hesitate......Its because of the throttle by wire shat.
If you carry the RPM"s thru each gear....you should not feel a hesitation.
Talk to me.
#3
hesitation
I also thought I felt a hesitation under WOT. But after having driven my 02SE several times now under these conditions, I think my expectation time maybe too fast. I've had a few occasions where I've floored it from a stop and I've yet to have a case where I didn't come out first. Granted this doesn't mean that my car is not hesitating. I've just noticed that I don't see the hesitation anymore. It may be that I've become used to it. It may be that I'm more anxious about the "race". I suspect that its more of getting a realistic expectation of a "launch".
#5
Me too...
Yep, I feel it also. It doesn't even have to be full throtle, sometimes just half way will make it hesitate. It is quite annoying. When I bring it in to the dealer for my first oil change it's one of the things on my list to address.
#6
Well, I can't say I'm glad others are experiencing this, but at least I know it is not just with mine. It does feel sort of like something "kicks in" when you accelerate and true it doesn't have to be WOT. If I feather the throttle smoothly, it usually doesn't occur; it is just when I really go for it I'll get the little hiccup, so to speak. I don't like it, but apparently it is part of the package. Something they'll probably fix for the 03's, I'm sure. I haven't yet mentioned it to my dealer; can't imagine what they'd do. But might as well get it on record in the event it is something serious. Maybe a TSB will come out for it, who knows.
srm
srm
#7
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Acceleration hesitiation in my 2002 6-spd
Yep, I've experienced the hesitation too! It's caused by a lack of fuel to the engine.....basically fuel starvation. No fuel = hesitation. It sucks I know. It gives me a pit in my stomach every time it happens but what can you do. BTW, my Max is completely stock, no mods to cause the fuel starvation problem. I hope they can fix this!
#8
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Originally posted by Maxmann
Maybe a TSB will come out for it, who knows.
srm
Maybe a TSB will come out for it, who knows.
srm
#9
Re: Acceleration hesitiation in my 2002 6-spd
Originally posted by fatfossil
It gives me a pit in my stomach every time it happens but what can you do.
It gives me a pit in my stomach every time it happens but what can you do.
#10
Re: Hesitation
Originally posted by Maxmann
I've posted on this before, but I'm still experiencing this "problem". I experience momentary hesitation under hard acceleration in almost any gear (I have 6 speed 2k2). It's not all the time, just when I floor it or thereabouts.
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
I've posted on this before, but I'm still experiencing this "problem". I experience momentary hesitation under hard acceleration in almost any gear (I have 6 speed 2k2). It's not all the time, just when I floor it or thereabouts.
Anyone else experiencing this and have mentioned it to your dealer? It is annoying, and my 2k1 didn't do this. Thoughts? srm
#11
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Re: Re: Acceleration hesitiation in my 2002 6-spd
Originally posted by Newman96SE
since the throttle is electronic couldnt a simple ECU reprogramming fix the problem?
since the throttle is electronic couldnt a simple ECU reprogramming fix the problem?
Are you starting to get a feel for this?
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Re: Re: Hesitation
Originally posted by RKS
Same problem here. 2K2 SE 6M. I thought it was the new throttle design Anybody want to organize this effort to have Niddan look at it?
Same problem here. 2K2 SE 6M. I thought it was the new throttle design Anybody want to organize this effort to have Niddan look at it?
#14
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This appears to be a prevalent problem with 2K2's, so it's possible that NNA may already know about it. Don't assume anything, however. EVERYONE EXPERIENCING THE PROBLEM SHOULD BRING IT TO THE ATTENTION OF THEIR DEALERS. You never know which dealer will cooperate and ask the Zone Rep to investigate. And you never know which Zone Rep is going to run with it. (Take it from me . . . some Zone Reps are better than others!)
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Originally posted by bhess
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
#18
Originally posted by bhess
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
srm
#19
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Originally posted by Maxmann
EXACTLY! As a matter of fact, when I first posted on this a couple months ago, that is how I described it. It is strange and I don't like it, either!!! We gotta do something. I've already emailed this thread to my dealer. I'm gonna start working them over, now!!!
srm
EXACTLY! As a matter of fact, when I first posted on this a couple months ago, that is how I described it. It is strange and I don't like it, either!!! We gotta do something. I've already emailed this thread to my dealer. I'm gonna start working them over, now!!!
srm
#20
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Remember, your dealer CANNOT fix your problem. What you want your dealer to do is open a case with Nissan North America in order to have a Zone Rep come out and look at the problem. YOU CANNOT OPEN A CASE WITH NISSAN NORTH AMERICA YOURSELF. You need your dealer's cooperation to accomplish that. So be prepared to balance your tenacity and persistence with an equal measure of tact and diplomacy. In other words, be firm but be nice. Once again, it's easier to attract bees with honey than with a baseball bat!
#22
Re: Acceleration hesitiation in my 2002 6-spd
Originally posted by fatfossil
Yep, I've experienced the hesitation too! It's caused by a lack of fuel to the engine.....basically fuel starvation. No fuel = hesitation. It sucks I know. It gives me a pit in my stomach every time it happens but what can you do. BTW, my Max is completely stock, no mods to cause the fuel starvation problem. I hope they can fix this!
Yep, I've experienced the hesitation too! It's caused by a lack of fuel to the engine.....basically fuel starvation. No fuel = hesitation. It sucks I know. It gives me a pit in my stomach every time it happens but what can you do. BTW, my Max is completely stock, no mods to cause the fuel starvation problem. I hope they can fix this!
Albert
#23
Originally posted by y2kse
Remember, your dealer CANNOT fix your problem. What you want your dealer to do is open a case with Nissan North America in order to have a Zone Rep come out and look at the problem. YOU CANNOT OPEN A CASE WITH NISSAN NORTH AMERICA YOURSELF. You need your dealer's cooperation to accomplish that. So be prepared to balance your tenacity and persistence with an equal measure of tact and diplomacy. In other words, be firm but be nice. Once again, it's easier to attract bees with honey than with a baseball bat!
Remember, your dealer CANNOT fix your problem. What you want your dealer to do is open a case with Nissan North America in order to have a Zone Rep come out and look at the problem. YOU CANNOT OPEN A CASE WITH NISSAN NORTH AMERICA YOURSELF. You need your dealer's cooperation to accomplish that. So be prepared to balance your tenacity and persistence with an equal measure of tact and diplomacy. In other words, be firm but be nice. Once again, it's easier to attract bees with honey than with a baseball bat!
thanks -- SS
l8tr
#25
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Originally posted by tbirdrob
I think the hesitation may have more to do with the variable flow muffler than with the electronic throttle. It only opens up under high demand, which would naturally cause a little bit of hesitation.
I think the hesitation may have more to do with the variable flow muffler than with the electronic throttle. It only opens up under high demand, which would naturally cause a little bit of hesitation.
#26
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Originally posted by bhess
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
I have it too. It drives me crazy. It almost feels like an automatic downshifting. I bought a standard so that I don't have to feel that.
#27
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Re: Letter to Nissan
Originally posted by nddst
I wrote a letter to Nissan in my "Dealership review" about the hesitation. We'll see if they say anything.
I wrote a letter to Nissan in my "Dealership review" about the hesitation. We'll see if they say anything.
#28
Originally posted by john2002max
Yes I have it too, I bought my 2K2 6 speed back in November and at first it seemed real bad, but after about 5,000 miles it seems to have gotten better. I also dropped in a K&N air filter that replaced the stock paper one. That seemed to help alot. I now have over 7,000 miles and I don't really notice it, or I might just be used to it! I owned a 2K1 5 speed and it never hesitated at all. Nissan really needs to fix this!
Yes I have it too, I bought my 2K2 6 speed back in November and at first it seemed real bad, but after about 5,000 miles it seems to have gotten better. I also dropped in a K&N air filter that replaced the stock paper one. That seemed to help alot. I now have over 7,000 miles and I don't really notice it, or I might just be used to it! I owned a 2K1 5 speed and it never hesitated at all. Nissan really needs to fix this!
Maybe it is a "design feature" in the electronic drive by wire, that is meant to prevent the engine from leaning out too much? and promote smooth throttle response. With conventional cable actuated throttle plates, there is already a split second delay during which your foot needs to move to depress the pedal and pull on the throttle cable which then opens the throttle plate allowing more air into the engine. Perhaps with the drive by wire, since where your foot is on the pedal is directly relative to the position of the throttle, when you jam on the gas, the throttle plate moves to WOT in a smooth and controlled fashion, hence the delay.
This could be for a number of reasons: bad drivers with twitchy feet that could cause a rough ride with the ultra sensitive drive by wire.
.. Preventing damage to a more delicate throttle unit, emissions purposes..
I don't know, I've not really noticed it much on my 2k2, but then again i've been driving it nicely. I have noticed it however on my girlfriend's newbeetle turbo s, which is also drive by wire, so perhaps it is universal to drive by wire systems. Either way, I think it is an air intake issue as aftermarket intakes seem to have a mitigating effect on the problem. I have noticed also that the engine seems to be choking for air at lower RPMs, hopefully this will not be a problem when I install my intake. The stock intake system looks VERY VERY restrictive and inefficient.
Basically it might be an overcompensation for a hypersensitive Drive by wire system. ECU reprogram might fix it.
Please remember, this is all PURE SPECULATION. I could be TOTALLY WRONG.
#29
your throtle cables. Nissan has a tendency to leave them loose. If the cable gives slack without accel, you can loosen the two nuts and stretch the cable back a bit so it is tight. That is what I did to my AE.
#30
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Originally posted by 20th maxstyle
your throtle cables. Nissan has a tendency to leave them loose. If the cable gives slack without accel, you can loosen the two nuts and stretch the cable back a bit so it is tight. That is what I did to my AE.
your throtle cables. Nissan has a tendency to leave them loose. If the cable gives slack without accel, you can loosen the two nuts and stretch the cable back a bit so it is tight. That is what I did to my AE.
#31
Originally posted by 20th maxstyle
your throtle cables. Nissan has a tendency to leave them loose. If the cable gives slack without accel, you can loosen the two nuts and stretch the cable back a bit so it is tight. That is what I did to my AE.
your throtle cables. Nissan has a tendency to leave them loose. If the cable gives slack without accel, you can loosen the two nuts and stretch the cable back a bit so it is tight. That is what I did to my AE.
2k2=Drive By Wire=Electronic Throttle control= NO THROTTLE CABLE
#32
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Originally posted by Chinkzilla
I've got a theory in the works, goes something like this . . .
I've got a theory in the works, goes something like this . . .
That may not be as far-fetched as it sounds. Believe it or not, emissions control is the reason why the engine in a 2K or 2K1 Maxima M/T will not decelerate instantly when you accelerate at WOT and then release the accelerator while simultaneously depressing the clutch. I'm not sure if Nissan has fixed that "problem" in the 2K2 M/Ts. But the condition and the reason for it have been confirmed in at least one published article.
You just gotta love OBD II.
#34
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I mentioned this in a former thread: Perhaps it's the variable length intake runners. I have a friend with a GTI and he said the VW guys complained about a similar problem. Is the intake runner just two diff lengths or is it totatly variable? Stepping down on the throttle more then you already are may cause the computer to change the runners. You don't feel it at constant full throttle because the runners are already switched. It seems to happen when you are steady on the throttle and then step into it a bit more. You don't have to floor it, just step into it a bit. It feels like the torque converter on an auto trans unlocking. That's the best way I can describe it.
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Originally posted by swallac2
I mentioned this in a former thread: Perhaps it's the variable length intake runners. I have a friend with a GTI and he said the VW guys complained about a similar problem. Is the intake runner just two diff lengths or is it totatly variable? Stepping down on the throttle more then you already are may cause the computer to change the runners. You don't feel it at constant full throttle because the runners are already switched. It seems to happen when you are steady on the throttle and then step into it a bit more. You don't have to floor it, just step into it a bit. It feels like the torque converter on an auto trans unlocking. That's the best way I can describe it.
I mentioned this in a former thread: Perhaps it's the variable length intake runners. I have a friend with a GTI and he said the VW guys complained about a similar problem. Is the intake runner just two diff lengths or is it totatly variable? Stepping down on the throttle more then you already are may cause the computer to change the runners. You don't feel it at constant full throttle because the runners are already switched. It seems to happen when you are steady on the throttle and then step into it a bit more. You don't have to floor it, just step into it a bit. It feels like the torque converter on an auto trans unlocking. That's the best way I can describe it.
#36
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Originally posted by y2kse
The 3.0L engine also has variable length intake runners, swallac2. But I've never heard of the problem described here occuring on a 3.0L engine. So unless Nissan changed the design of the intake runners on the 3.5L engine, I doubt that's the source of the problem.
The 3.0L engine also has variable length intake runners, swallac2. But I've never heard of the problem described here occuring on a 3.0L engine. So unless Nissan changed the design of the intake runners on the 3.5L engine, I doubt that's the source of the problem.
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Who wants to play ???
All righty, boys and girls. We have Nissan's attention. What I need to know is whether anyone has had this condition documented by their dealer. If not, someone needs to be willing to take their vehicle to a dealer and have the condition documented. At that point, I'm fairly confident we can get a Zone Rep from NNA to look at the vehicle.
Somebody talk to me . . .
Somebody talk to me . . .
#38
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Re: Who wants to play ???
Originally posted by y2kse
All righty, boys and girls. We have Nissan's attention. What I need to know is whether anyone has had this condition documented by their dealer. If not, someone needs to be willing to take their vehicle to a dealer and have the condition documented. At that point, I'm fairly confident we can get a Zone Rep from NNA to look at the vehicle.
Somebody talk to me . . .
All righty, boys and girls. We have Nissan's attention. What I need to know is whether anyone has had this condition documented by their dealer. If not, someone needs to be willing to take their vehicle to a dealer and have the condition documented. At that point, I'm fairly confident we can get a Zone Rep from NNA to look at the vehicle.
Somebody talk to me . . .
So what do you know, elighten us?
#39
Originally posted by y2kse
Well as long as we're speculating, try this one out for size. Maybe the hiccup is an emissions issue. Perhaps when you stomp on the accelerator, you flood the cylinder with more gasoline than the engine can burn efficiently, thereby releasing too many hydrocarbons. As a result, the ECU may be programmed to momentarily retard the ignition when it senses WOT.
That may not be as far-fetched as it sounds. Believe it or not, emissions control is the reason why the engine in a 2K or 2K1 Maxima M/T will not decelerate instantly when you accelerate at WOT and then release the accelerator while simultaneously depressing the clutch. I'm not sure if Nissan has fixed that "problem" in the 2K2 M/Ts. But the condition and the reason for it have been confirmed in at least one published article.
You just gotta love OBD II.
Well as long as we're speculating, try this one out for size. Maybe the hiccup is an emissions issue. Perhaps when you stomp on the accelerator, you flood the cylinder with more gasoline than the engine can burn efficiently, thereby releasing too many hydrocarbons. As a result, the ECU may be programmed to momentarily retard the ignition when it senses WOT.
That may not be as far-fetched as it sounds. Believe it or not, emissions control is the reason why the engine in a 2K or 2K1 Maxima M/T will not decelerate instantly when you accelerate at WOT and then release the accelerator while simultaneously depressing the clutch. I'm not sure if Nissan has fixed that "problem" in the 2K2 M/Ts. But the condition and the reason for it have been confirmed in at least one published article.
You just gotta love OBD II.
I plan on complaining to my dealer next time I am in there.
BTW does anyone know why when I shift under semi-hard acceleration, sometimes my rev's continue upward about 500 rpm in neutral until I release the clutch. I have observed this many times making sure that I fully released the throttle.. what's going on!?
Swallac2: I sold my old car to carmax, and yes, their service does suck. When I was waiting for my papers, I saw an old lady that had been waiting there for 3 hours for an oil change. BTW if anyone bought a sunlit sand 2000 GLE from carmax plates 4PTE somethin, take care of her!!