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Sewing machine like noise when accelerating - when COLD only
I have a noise on my 2007 Nissan Sentra 2.0 w/ CVT tranny & 55,000 miles.
When the car first starts in the morning and I accelerate from a stop, it makes this annoying tap-tap-tap noise, that makes the engine just sound really loud, that goes very quickly and seems to be in sync with how hard I hit the gas. The engine purrs like a kitten and is pretty quiet when at idle in Park, neutral, drive and reverse - the noise only comes when I accelerate (it doesn't occur if I rev in in park). It goes away somewhere after 2000-2500 RPMS and is gone completely (or at least barely there) after about 10 minutes of driving. The car has been meticulously taken care of and had all oil changes and everything done on time so I'm confused - and scared - about what is wrong.
I always blare the radio so I'm pretty sure this could've been there for a while but I don't really know - I've only had the car for 6 months. I just heard it by accident when the radio was off first thing in the morning.
Anyone have any ideas?
When the car first starts in the morning and I accelerate from a stop, it makes this annoying tap-tap-tap noise, that makes the engine just sound really loud, that goes very quickly and seems to be in sync with how hard I hit the gas. The engine purrs like a kitten and is pretty quiet when at idle in Park, neutral, drive and reverse - the noise only comes when I accelerate (it doesn't occur if I rev in in park). It goes away somewhere after 2000-2500 RPMS and is gone completely (or at least barely there) after about 10 minutes of driving. The car has been meticulously taken care of and had all oil changes and everything done on time so I'm confused - and scared - about what is wrong.
I always blare the radio so I'm pretty sure this could've been there for a while but I don't really know - I've only had the car for 6 months. I just heard it by accident when the radio was off first thing in the morning.
Anyone have any ideas?
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The mass airflow sensor (MAF) in your Nissan vehicle measures the amount of air going into the engine
If the MAF sensor sends the wrong signal to your car's computer--because of dirt or other contamination around its sensing elements--your engine will be fed with the wrong amount of air/fuel mixture.
If anyone else has information on this it would be helpful
When cold makes a knocking noise. But with the time, this noise becomes louder and occurs even when the engine is hot (much lower).
My car is only 20k miles, 2 years, and Nissan is rebuilding the engine. The problem that causes this noise is the IMPROPER PERFORMANCE OF THE PISTON RINGS that leaves the oil goes to top of piston, causing carbon deposit, and after some months can even lock the rings.
The consequences depends the kind of use. If you use your car in low speeds and little time (like me, 10minutes, 4 miles from home to work) the consequences are worse and quicker.
The Nissan did not recall because it does not cause safety problems, but after that, Nissan never more.
the noise is gone now, so I guess everything's alright. just glad that they didn't chalk it up as a sound that is "to be expected"
http://youtu.be/MCFcBgu33xM