| crash |
Hi,
Those keeping track will notice that this is my third problem with Mo in as many weeks. My patience with Mo is dwindling.
When driving home, Mo started to hesitate then surge when accelerating. Specifically, when I began to depress the gas pedal, nothing happened - then around 2,000 rpm it felt like the engine was getting some fuel and it surged forward. Doesn't matter how heavy/lightly I pressed on the pedal, the response was the same.
Any thoughts on this? Please god, don't let it be the fuel pump....I just spent $1K in repairs in two weeks....I don't want to look down the barrel of that repair.
As an FYI, Mo has 140,000KM's.
HELP! |
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| Eric L. |
| sounds like a bad throttle position sensor or electronic throttle body |
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| Lightninrod |
How many miles on the fuel filter?
Dan |
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| njjoe |
quote:
Originally posted by Lightninrod
How many miles on the fuel filter?
Dan
Dan-
The fuel filter is integrated into the fuel pump and fuel level sensor. It cannot be replaced separately.
Now having said that, I agree with you, it does sound like a fuel starvation problem. Whether it is mechanical (fuel pump, filter) or electrical (throttle position sensor, throttle body, etc.) is hard to say.
-njjoe |
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| Lightninrod |
quote:
The fuel filter is integrated into the fuel pump and fuel level sensor. It cannot be replaced separately.
YIPES! What is the expected life(assuming name-brand, high quality fuel is purchased) of the filter? My experience(non-MO) has been from 3-15,000 miles.
Dan |
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| Eric L. |
quote:
Originally posted by Lightninrod
YIPES! What is the expected life(assuming name-brand, high quality fuel is purchased) of the filter? My experience(non-MO) has been from 3-15,000 miles.
Dan
Nissan specifies no service interval for the integrated fuel filter, so it might be lifetime. :( |
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| UncaDanno |
crash,
Did you buy this MO new? Just curious. If not, when did you buy it? |
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| crash |
quote:
Originally posted by UncaDanno
crash,
Did you buy this MO new? Just curious. If not, when did you buy it?
nope....bought it used. 2 years old w/ 50K on it.
Drove Mo yesterday and the problem didn't seem to be there.....what's curious is there are no check engine lights on.... |
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| I-285MURANO |
quote:
Originally posted by crash
Hi,
Those keeping track will notice that this is my third problem with Mo in as many weeks. My patience with Mo is dwindling.
When driving home, Mo started to hesitate then surge when accelerating. Specifically, when I began to depress the gas pedal, nothing happened - then around 2,000 rpm it felt like the engine was getting some fuel and it surged forward. Doesn't matter how heavy/lightly I pressed on the pedal, the response was the same.
Any thoughts on this? Please god, don't let it be the fuel pump....I just spent $1K in repairs in two weeks....I don't want to look down the barrel of that repair.
As an FYI, Mo has 140,000KM's.
HELP!
My MO had the same issue turned out to be the throttle body or something to do with the throttle, therefore they replaced it. |
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| crash |
| any idea on what the value would have been had you paid? |
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| njjoe |
quote:
Originally posted by crash
any idea on what the value would have been had you paid?
C-
The throttle body has a list price of $592, but can be had for around $450 at auto parts stores.
-njjoe |
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| Eric L. |
| I'm going to the dealer tommorrow, most likely for a TPS or throttle body - if I can find the price, I'll post it here. SES still on for me, drives fine except revs seem to hold at 1000rpm when I come to a stop, then suddenly drops past idle speed and recovers with a little bump. Feels weird. Hope I make it to the dealer tomorrow morning without any more issues. |
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| 4qts |
Please let me know what the dealer finds. I have the exact same problem, but have been told by the dealer they can't find anything and it doesn't happen all the time so they never can reproduce it.
I should clarify that I have the same problem as I-285MURANO. There is a surge at around 2,000 rpm followed by a drop in power which the tach shows clearly about 1,000 rpm total between surge and drop. To me this is a serious problem, but since it does not happen all the time, especially when the dealer has it, they just say to wait for the check engine light to come on. This frustrates me because I think they should investigate a little more. They even made the mistake of saying that they saw one MO that needed a new throttle body because of a problem like this, but that without a check engine light they could not swap it under warranty. |
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| Lightninrod |
All(?) EFI engines have an IAC(Idle Air Control valve) bolted to the engine on or near the intake plenum. It is electronically controlled to allow the proper amount of air to enter the engine when at or near "idle" RPMs.
A dirty IAC is a common occurrence on many engines with a few thousand miles on it and it will create a 'hunting' idle and may even 'kill' the running of the engine at idle. This occurrence goes away above 'idle' RPMs.
It can get carboned-up over time, preventing its proper operation. Cleaning it is a very easy job on the engines I've had over the years but, I'm unfamiliar with our Mo engines as I just got our new, 2007 Mo. It can also get worn so cleaning won't fix that.
Just a SWAG but it might be the 'culprit'?
Dan |
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| kanlyho |
I have this problem for more than a year, been to the dealership 5 times and get the same answer, we can't reproduce the case and won't do anything unless the engine light is on.
Notify Nissan Canada and no feedback.
Talked to some tech guys and they suspect it's the TPS, this happens on mine whenever I'm stucked in traffic for over 10 mins, especially hot weather, it will be gone when you turn off and restart your engine. |
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| inspector |
Had the same problem.
Dealer performed the following.
Idle relearn and throttle position relearn. (ivar/tprelearn).
MO has 103,000 kms.
Cost $103.00. |
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| njjoe |
Amazing. $103 to raise the idle on your car. It used to be just a quarter turn on the idle screw.
-njjoe |
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| Nathan @ NBO |
| It could in fact be a lot of things. As stated, some fuel problems (clogged filter, injector malfunction, fuel pump), fouled plugs, bad wires (actually had these same symptoms happen to me on a civic, turned out a plug wire was exposed and would intermittently ground on the valve cover), iac, tps, etc. I would check the obvious before you start removing components. |
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| crash |
| The problem was coming and going for me - so I dropped it off for service...they can't diagnose (no SES codes / anything) - so they're going to do what inspector had suggested (relearn) and are also going to clean the throttle body.... |
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| biggun |
WOW, that's the same symptoms I had when I traded in my Chevy Blazer for the MO. My biggest concern at the time was that it may be the trans.
I didn't want to go nuts troubleshooting and spending all kind of money on it since it had 187,000 miles on it. Surprisingly the dealer still gave me two grand for it. |
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| Ophitoxaemia |
ive felt what might be the same as described here. 2003 Sl AWD, 85K
sometimes when starting from a stop, pressing the gas pedal lightly causes no increase in engine rpm, pressing a little harder and then it surges up to 2K and the car jerks forward. it feels like the car cant tell i am pressing the throttle until it gets to a certain point.
then on the next stop it operates normally.
it seems to be worse after a long drive (over an hour)
i also noticed some surging on cruise control- would not hold a steady speed.
will clean the iac valve and throttle body. wife uses the car for many 1 mile trips.
considered resetting the computer. is there a better way than leaving the battery disconnected overnight?
thanks,
james |
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| Warhammer |
It sounds like you have a gas pedal position issue. There is no cable going from the gas pedal to the throttle assembly. The computer knows where the gas pedal is because it is a point to point system. The pedal is connected to an electronic assembly that senses where it is for more accurate fuel injection.
If you leave the battery disconnected overnight you'll have to relearn the Idle Air Volume, throttle position, etc.
Give 'er a try and see what happens. Good luck! |
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