Skip the auto shop - Our mechanics make house calls

Q: Car has hissing sound when initially accelerating

asked by on

I have been searching a long time for a solution and hope that you can help me. There is a hissing sound whenever I accelerate. The hissing occurs only in the initial phase of the acceleration. I can not detect from where it is originating. The volume also changes and sometimes it is louder than other times. Another item of concern is that sometimes my car feels sluggish, but other times it feels light and powerful. Do you know what is causing this hissing and the sluggishness?

A: Hi there, thanks for writing in about your ...

Hi there, thanks for writing in about your 2006 Porsche Cayman. Generally, a hissing noise will come from a leaking vacuum source or something like an exhaust manifold gasket. The vacuum leak will cause some performance issues as the engine computers have a hard time regulating fuel delivery. If you would like to have this checked, a certified expert from YourMechanic can inspect the noise and perform any needed repairs.

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

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: What's wrong w/ my steering?

There are many, many components in the suspension that could account for the noise, some are not expensive to repair and all can be repaired right at your location. Thus, I encourage you to seek out a diagnostic and then...

Q: I'm having trouble Installing new driver side (left) CV axle

It's possible that there is some rust or dirt built up in the splines that is preventing the joint from sliding all the way home. If you can purchase a wire brush about the size of a toothbrush, you can...

Q: Speedometer not working

Hello there, you are correct. Both of the codes on your 2001 Hyundai Elantra can relate to the speedometer. The P0720 code is for output speed sensor circuit fault, this can be caused by a faulty speed sensor, a wiring...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...