Skip the auto shop - Our mechanics make house calls

Q: Car making loud noise and barely running.

asked by on

Emission light is on and car is making a loud noise when you push the gas pedal. It also runs rough when pushing the gas pedal. At first it was not noticeable, but now is very loud. The car will only go 40 MPH and barely runs.

This sounds like it could be a serious problem for your car. My first recommendation would be to have this vehicle inspected by a certified mechanic as soon as possible to avoid these symptoms turning into larger problems. The list of reasons is quite long for the symptoms that your car is experiencing, but from my experience it definitely sounds like the engine may have gone into limp mode. Limp mode is a sort of fail safe that allows the vehicle to run enough to get it off the road, allowing you to park it safely in a spot away from traffic and freeways. From the description provided, it seems this is a problem you have had for some time and has eventually gotten worse with time. In my professional experience I highly recommend enlisting a certified mobile mechanic to diagnose why your check engine light (also known as an emission light) is on and help get your engine running in tip top shape again. It is important to not drive your Trailblazer until it’s been properly repaired, so the car does not incur more damage.

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: Can this problem be caused by something as simple as having low coolant levels?

The light that came on was not identified and since you lost power it is assumed the light was a check engine light or throttle control light came on. The computer will limit the throttle opening and reduce power if...

Q: Loud noise from underneath car.

Hearing any noise coming from your car can be startling, but it can be especially so when that noise is so loud others cannot hear you! Though the information provided is a bit limited, my experience tells me that the...

Q: Everytime I drive my car is "putting" like it's going to lose power what is switching gear perfectly

Hello. There are a lot of things that can cause this. Most of the time it is caused by a worn out timing belt or a clogged catalytic converter. It can also be caused by a failure int he transmission....

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...