hehe that damned tranny... what about the UDP.. can you give your review of it now?

 

Still having hesitation problems when I hit 4K rpm (not related to UDP). Feels like the engine stops for a split second and starts pumping again. Weird... and it sucks when you race people because that split second means I have to do some catching up...

We/I asked around and have come to the conclusion that:
a) spark plug(s) have problems
b) ECU is screwed up
c) ignition coils
d) came gears have problems

If anybody can help, I'd really appreciate it.

 

i dunno if this is what u are talking about but in the last few days i have been driving and when i punch it the car starts to accelarate and then all of a sudden the car just seems like it lost power and then it starts again... it happened a few times... at first i thought maybe its the traction control cutting the power to the engine cause it thinks im spinning... but i dont remember the light coming on on my dash... maybe it has to do with the ecu and that? i gotta test it out next time and see if i shut the traction control off if it will still do the same thing... kev do u have traction control?

 

I don't have traction control.

When does your car hesitate? You situation sounds similar to my problem.

 

i didnt really check what RPM it happends at i will take a look next time it happends... but it is very annoying... if its not the traction control then this really really suxxx... i gotta go in for the tranny tsb and hopefully they will change that out... not just the tcm or solenoids... i just have to find a time that i can bring the car there and not need to use it for a little while

 

My car is a 5 speed. I know that in the morning or if I just started my car it will hesitate a couple of times. It usually happens at lower rpms though. I kind of think of it as my womans little good morning cough! After a couple of coughs she is ready to "swallow the commpetition!" The maxima is no spitter by any means!

 

QUOTE]Originally posted by psing23

i didnt really check what RPM it happends at i will take a look next time it happends... but it is very annoying... if its not the traction control then this really really suxxx... i gotta go in for the tranny tsb and hopefully they will change that out... not just the tcm or solenoids... i just have to find a time that i can bring the car there and not need to use it for a little while [/QUOTE]

Yeah it definitely sucks because we don't know what the problem is.

Hmmmm... has it happened while you were driving at higher rpm's?

 

hehe... never thought of my baby in that way... but i never go over 30mph until the temp gauges arrow is over the C (started moving already so indicates engine is warmed up) Usually when i start the car in the morning i drive around in 2 and not more than 25 - 30 mph... this hesitation happends to me when the engine is definatly warmed up and been driven already for a little while...

It also happends to me on turns sometimes... if a take a hard turn and i slam on the gas the car down shifts on the turn but then the hesitation happends and then it goes... it is horrible... now that im trying to remember what happends it happends right after the car down shifts and tries to go up into higher rpms... i will look at it next time it happends... (hopefully never)

 

I try to take it pretty easy on the engine when I first fire her up so I am not too sure if it does it at 4k I do know it has hesitated a couple of times because I am a split second too late for the limiter though!

Tonight I will see what happens when I leave work!

 

Can you explain this problem a bit more. I notice when in third gear revving up to just past 3k rpms, there us sometimes a slight lag in the acceleration. I have an auto btw....

 

by lag do you mean that it accelarates slowly or do you mean that it seems like power is lost for a second or 2 and then it regains?

cause what i have the power just disapears for a few seconds and then it like kicks in again...

 

My hesitation started after the UDP install.

We were driving back home on the freeway and I was testing out the UDP by gunning it every so often. While driving, we spotted a member of Max.org driving home and we decided to play car tag. It was raining that night, but not to the point where the roads weren't safe enough to have a little fun. Nothing was wrong so far.

We stopped playing car tag after a while and started to drive normally. After a few minutes, a van decides to pass me up and cut in front of me. A big wave of water splashed all over my car... it was big enough to make me have 0 visibility until my wipers moved the water. I decided to change lanes and pass him up because no one wants to drive behind something that big when it's raining, right? When I gunned it the rpm needle hit 4K (I didn't know at that time), and the car hesitated and the Check Engine Light came on. I thought to myself, "Oh, no I might have ingested some water." I slowed down waiting for the car to die, but it ran fine, so we kept driving (but wondered what happened).

After taking the interchange, I decided to gun it again to see if the hesitation would repeat itself. To our surprise, it happened again! Oh no! Something must've screwed up.

The next day, I resetted the ECU by disconnecting the batterry and took the CAI filter off. I found that the filter was dry and no water spots can be seen or felt. We checked and redid all the tension belts for the UDP thinking it might have been the cause of the problem. Everything was fine and up to spec.

We drove home thinking everything was fine, then when 4K hit, *BOOM*! Check Engine Light and hesitation! Doh!

The error code the ECU throws out is the camshaft position sensor. The next week, we checked the sensor with a multimeter and that was within spec. To humor ourselves, I borrowed Turbo95Max's extra cam sensor assuming mine went bad. We drove home that night and guess what? Hesitation and Light again!

So far he's gone through all the troubleshooting steps in the 2k service manual but can't find anything. We've asked around and here's what we think the problem might be:

a) spark plugs or
b) ECU or
c) ignition coils or
d) cam gears

Now, I get hesitation once in a while and the "Light" is on. Help... anybody? Thanks.....

 

so the light went on from the 1st time this happend? cause my light never came on... but i can remember going through water that way were the car was covered for a good 2-3 seconds and i didnt see sh*t... it was when i went to floyd bennett field to get the permit for the meet... I have an OSCAI... thats the only mod i did... and i checked the filter just a few days ago to see if there is any dirt or leaves and there is very little sand at the bottom of my filter box... I will go out now and see if i get the same thing... when i will return i will let u know if i got the hesitation... is it when u hit 4k rpm in any gear or from a start?

 

For me it isn't like two seconds long....it is much shorter. The rpms just kind of stay there for like a less than a second and then start going up. Kev, could it be that you are having the same problem as us, but maybe for you it is much more apparant because of the UDP? I will check again, but there is so much damn traffic here that at 3 or 4k rpm in 3rd gear is too fast already. I gotta find an empty road, maybe this weekend.....

 

I've got the hesitation problem too. What's more, my car will detonate after the hesitation occurs. Then if I back off and drive normally for awhile, the hesitation and detonation will disappear and the car will go back to driving normally. Unfortunately (or fortunately, depending upon your perspective), the ECU has never thrown a check engine light so there's nothing for Nissan to diagnose.

My car's at the dealer right now. They're pulling all the sparkplugs to find out if the detonation has caused any damage to the plugs. They've already put a Consult on the ECU and naturally, it didn't show any sign of a problem. But I know the problem exists . . . period.

 

Here's a thread between Daniel B. Martin and I if anyone is interested:

http://forums.maxima.org/showthread.php?threadid=32466

 

Yeah, once it hesitated, the light came on. Thanks in advance for the info.

That doesn't sound like it... what I feel is the whole engine stopping and then starting back up. The rpm's dip about 500 because it "starts" back up again.

Don't floor it from a stop. Have the car in third and increase the rpms (don't make the car downshift). Have fun.

Woah... my car doesn't detonate. I'm surprised your ECU hasn't thrown anything. Good luck!

 

ok i just came back but its really wet outside so i just get extreme wheel spin if i shut the traction control off and if its on it cuts the power the way i felt it cut before but the traction control light goes on which means that it is doing it when its slipping... i gotta wait for the ground to dry up... im planing on going to dpa tonight so i will see whats up overthere...

 

I think i've felt this problem too, at first i thought it was the slippage in the TSB but after bringing my car to the service department, they said they could not recreate the problem or whatever


it's almost like you pound the gas, the car doesn't do anything for a half a second, and all of a sudden it revs.. happens a lot when I'm rolling or taking a turn, not so much when i'm at a dead stop

does this sound familiar or am i way off base?

 

I've had a similar problem happen once. I was in 3rd gear, I slammed the gas, but my car didn't go anywhere. Felt like I was trying to go from 30 to 60 in a honda civic while in 5th gear. It felt as if my engine wasn't getting enough fuel or something. It was real strange, but it has never happened again.

 

I went to DPA tonight and im glad to say that i could not recreate what happend... only if the traction control was on and the car was actually slipping did it cut the engine power... so i guess i just didnt notice the slip light flashing the first time i did it...

 

It doesnt happen to me.

 

I was gonna go tonite too, my friend just got a new car and wanted to bring it over there.. what town are you from?? I'll be there all summer just chillen

 

i came from brooklyn

but ill be there again

 

This is a different problem than what you guys have been describing. It's not a delay... but feels like the engine just shuts down for a split second.

Trust me, you wouldn't want this problem.

 

I have experienced the problem you guys are talking about.
It seems to happen only when the car is moving at around 3K-4K rpm. Most recently, I was racing a Nissan Sentra, and coming out of a turn, I gunned it... and the car hesitated for about 1-2 seconds, then picked up. I did not see any warning lights come on, and my traction control was off.
I also get this alot when I do a " California Stop ", rolling slow at a stop sign, and accelerate after a second or two. Man, this is really bugging me now. But at least I know I am not crazy....

 

thats when i experience it the most too.. rolling then going..

 

ye thats something else.. thats more like a lag... what me and kev experienced is sort of lets say u are at 4000 rpms and u press the gas to go the car drops down to like 1000 rpms if not less and just doesnt accelerate AT ALL and then it starts accelerating after like a second or 2

 

after the second or two, do the rpm's jump right up and the car takes off, or does it accelerate at a normal pace?

 

at a normal pace as if no "drop off" ever happened is what i meant to say..

 

The rpms drop a few hundred and the car just accerlates again. What most people are describing is lag, which is different than what psing23 and I are experiencing.

 

Is the lag related to the tranny TSB or any other fixable problem, or is it just somethin you have to deal with ?

 

My problem doesn't seem common. It's not shift lag because I know how that feels. This is something specific to my (and psing23's car), so we have to deal with it. Trying to solve the problem.

 

ye this really sux... im trying to test it buts been raining all the time... so i got no traction whatsoever...

tomorow im going upstate shopping its like 50 miles each way so i will have a chance to test it...

i just changed my oil today... hehe the guy tried to sell me a new air filter... i got my k&n in there...

 

I've got the sudden loss of *any* power for a split second problem. It only happens right after the car is started in the morning. It feels quite jarring and can't be good for the engine. No way in hell the Nissan techs are going to diagnose it. I'm glad the powertrain warranty is 60,000 miles.

 

KevSe, and psing.. are your your transmissions automatic? And both of you guys have a UDP's? I mean, if you both drive automatic and you both have UDP, then you could at least investigate the UDP thing further. For the other guys who've been noticing a "lag".. that's all it is, a lag. Most likely the same kind of lag that you get when your car is drifting at like 5 MPH and your in second gear(for those with stick) and then try to gun it.. and obviously.. it lags. I feel for you guys(kevse and psing).. I hope you guys figure something out.

-RPNY

 

Well the problem I have is when I'm driving normally and wait for someone to catch up so I can race him.
If i'm like at 40 mph and then punch it I get a slight hesitation before the car kicks in. its worse when its at a 60 mph punch.
are you talking about this sort of problem guys?

 

I dunno but somehow mine went away... It stopped slipping... It stopped delaying...
It is totally stock Auto... I dont have a UDP... yet...
all i have is an OSCAI

 

no, i think that is just the tranny deciding whether to downshift or not....that is normal to a certain extent. This problem is like when you are constantly accelerating, you get a sudden loss of power..

 

Oh. I don't have that problem.
I don't think.
Hrmmm. I will see if I have that problem now.

Lets work together and get this thing fixed