Skip the auto shop - Our mechanics make house calls

Q: Rattling noise in neutral. Car won't go over 30mph in 3rd.

asked by on

I have a rattling noise coming from behind my skid plate (I think) while my car is in neutral. The engine starts up, and I can put it in gear. After I start driving, the engine doesn't have much power and once in third gear struggles to get up to 30 mph. What is wrong with my engine?

Hi thanks for the question, man, there is nothing worse than a car that won’t go anywhere when we want or need it to. It sounds like you may be having a problem with your catalyst converter in your exhaust. The rattling you’re describing could be a result of the core inside melting and breaking loose, causing the rattling you’re hearing, and also acting just like a plug in your exhaust pipe, so your engine can’t breath. Enlist the help of a mechanic who has the right test equipment to pinpoint the cause of your problem.

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: Car hesitates while accelerating, EGR valve is a recurring issue - 1999 Isuzu Amigo

Hello. If replacing the EGR valve did not fix the issue, then the EGR valve was likely not the failed component. I would check to make sure that there are no exhaust leaks in the EGR system, as any of...

Q: Adding air intake

One of the best brands for performance intakes would be K+N. These intakes, however, make very minimal difference to a four cylinder vehicle. These engines have been designed to produce as much power as possible due to the fact that...

Q: Fuel Pump

Hi There, This can and will damage the fuel pump permanently, in some cases even the first time this happens. Although, it may be possible for it to happen once or twice without causing permanent damage to the pump. As...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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.