Skip the auto shop - Our mechanics make house calls

Q: My car is not driving smooth as I feel hard acceleration but only at low speed i.e 40 km/hr

asked by on

I bought this car few months before, it was much smoother, few days back I drive my car to school in heavy rain. When I came back home after school I heard a noise from engine, I go to mechanic and he replace the compressor bearing and that noise was gone, but now when I accelerate car slowly I feel hard acceleration and hear very low "grrrrr" sound but this sound is only heard by me mechanic does not hear that and said car is perfect! But now I feel car is not driven smooth as it was before! Please help!
My car has an automatic transmission.

A: Hi there. This presents an interesting situ...

Hi there. This presents an interesting situation and I completely understand how you feel. It's almost like now that something has gone wrong, you wonder what else is going wrong with the car? And it doesn't feel like it should. More often than not, there may not be anything going on except in our own mind; we never seem to notice much until something happens. And you're right to try to get to the bottom of it.

I have to ask first, why was the compressor bearing replaced? When you were driving through the rain, what type of noise did you hear? If it was a squealing noise, then it may have simply been water that had gotten onto the serpentine belt while driving in the rain. However, I still do not know why a compressor bearing was replaced. As for the low "grrr" sound, this could simply be a resonation from the AC tubes if they were repositioned during the repair.

I have also experienced Toyotas that develop a similar sound or low rattle type sound under moderate acceleration from the exhaust manifold heat shields and/or the intake manifold bolt hole inserts becoming loose. This wouldn't necessarily be a safety or engine performance concern, but would definitely make you feel like it is. Be sure to have a professional mechanic, such as one from YourMechanic, perform an inspection to determine what repairs are needed.

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・Save up to 30%

Get a quote

What others are asking

Q: What does the 15% next to my oil light mean?

Hi, thanks for writing in. I'd be happy to help. This is telling you that your car has 15% life on the oil left, before it is recommended to change it. Make sure the person that changes the oil and...

Q: AC making noise 3 for years

Hi, thanks for writing in. I'd be happy to provide my insight. The difference in price is usually a difference in warranty and whether the product is new or refurbished, or in some cases, used. Typically, parts on eBay and...

Q: My Mustang is making a squeaking/chirping sound when driving and or coasting. When I apply brakes, the sound stops. What is the problem?

Hey there. A possibility of the noise is lack of lubrication on the brake hardware. If you have rear disc brakes, it could be the pad(s) continuing to contact the rotor after you release the brakes which is due to...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.