Skip the auto shop - Our mechanics make house calls

Q: Buzzing noise at 3,000 RPM on a 1991 Nissan Sentra

asked by on

My 1991 Nissan Sentra makes a buzzing-sound noise at about 3,000 RPM. It's been annoying since that's a constant RPM on a highway. I'm suspecting some loosened exhaust or some loose heat shield.

Yes, it easily could be but it makes it only at the highway speed, so it would be really hard. Jack it up, get under there and hit things with a rubber mallet, and if you hear something rattle, tighten it back on. You can watch my video "finding the sources of car noises" for pointers. There’s a cool tool out there and I bought mine used for 50 bucks, that has a receiver and semi units. You just put the units around the car, put on headphones when someone else is driving your car and when you hear the rattle, you switch the receiver to the different broadcast units and figure out where the rattle is coming from. That’s really handy. You could also have a mechanic, such as one from YourMechanic, detect the source of the sound and make the needed repairs to have this issue resolved.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Blue smoke black smoke white smoke what do they mean

Hello. If there is blueish smoke coming from the exhaust, then that is an indication that the engine is burning oil. This can come from the valve stem seals or from the piston rings. It can also come from the...

Q: Having run for 20 - 30 minutes, it will not start.

The fact that everything else came on when the key is on suggests this is a starter relay problem. The starter relay is a small switch that relays power from the battery to the starter, directing it to turn the...

Q: Radiator leaks 2003 Nissan. Sentra gxl automatic transmission gxl model

Hi There, Depending on how severe the leak is or where specifically on the radiator may depend on how the fix may be approached. In some cases the radiator leak may be repaired without replacing the radiator. In other cases,...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.