Q: Car stopped accelerating and started smoking while driving on the highway

asked by on February 02, 2017

Car stopped accelerating and started smoking while driving on the highway

My car has 125000 miles.
My car has an automatic transmission.

Smoke from engine or exhaust Inspection $79.99 - $89.99 Get a Quote

Hi There, It depends on the color of the smoke you are referring to as the color of the smoke will mean a few different things. White smoke indicates that you may have an internal engine problem, such as a head gasket leaking coolant into a cylinder. Black smoke coming from the exhaust is usually an indication of a rich fuel condition. When this happens, this can be the result of many things such as faulty fuel injectors, a failing mass air flow sensor or a faulty fuel pressure regulator allowing too much fuel to be supplied to the combustion chamber to be burnt. When this happens the result is an excess amount of unburnt fuel being passed through the exhaust coming out in the form of black smoke. Blue smoke coming from your exhaust generally means that the motor is burning the engine oil. This can happen for a couple of different reasons such as worn piston rings or leaking valve guide seals. When this happens, the engine oil is burned in the combustion chamber along with the fuel which is what generates the blue smoke coming from the exhaust. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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

What others are asking

What do I do if the engine in my Honda Civic overheats?

Overheating is a very serious situation. Too much heat could severely damage your engine. If the needle of your temperature gauge is pushing into the red, here’s what you need to do: Find a safe place to pull over....

Potential electrical issue? Already replaced alternator and battery.

Hi there. I understand how frustrating things like this can be. I don't think you have any serious underlying electrical problems with the car. What I believe may be happening is simply a case of bad luck with aftermarket parts;...

Truck bogs down at wot.

Hi there. It appears as if you've checked all the usual suspects that can impact acceleration "bogging" issues except for two the throttle body and fuel injectors. When you're quickly applying throttle to a fuel injected engine, having a clean...

Car not going over 20 MPH

Hello. If the car will not go over 20 MPH then there can be a number of issues going on. If the Check Engine Light is on then the computer needs to be scanned for codes first. If there are...

My car weak to start , battery & alternator ok, I put fuel injector cleaner today, some emissions smell exterior, what can it be?

Hello there. Many different faults can cause your 2000 Honda Accord to be slow to start. The most common fault is the battery. If the battery has been load tested and ruled out, there are other possibilities. Other likely faults...

What is the lockout prevention?

Lockout prevention is a handy feature that you’ll be glad you have. If you’re anything like the rest of us, you’ve at least had some close calls with locking your keys in the car, often in the ignition. Your...

car stopped while on road and couldnt move while in gear

The fuel pump could have failed. The timing belt could have slipped. A mechanical component could have broken. To determine exactly what has gone wrong, and to have the required diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic...

Shaking at 16-19 MPH or when turning

From what you've described, it sounds like your engine mounts are bad. At low speeds your engine will shake until you reach higher speeds. To fix the problem, you will have to get the engine mounts replaced. To avoid any...

Brakes heating up and locking

The brakes dragging could be from several causes. A full service of any components, such as the booster or master cylinder could have not been adjusted properly when installed. It is also possible that the brake calipers are binding. I...

Related articles

The Best Used Cars to Buy for Teenagers
If If you’ve decided that you’re ready to purchase a used car for your teenager, then you’re probably pretty picky about what you’re looking for. Likely affordability, safety, and fuel economy are high on the list. With that said we’ve...
The Top 5 Selling Cars in Arizona in 2012
Depending Depending on where you live in Arizona, the weather is either arid or there may be periods of heavy snow – such as in the mountain areas. The vehicles that have been popular in previous years for the area,...
The Best Used Cars to Buy If You’re a Wedding Planner
As As a wedding planner, the demands placed on your time are going to be significant, even if you’re only dealing with one or two couples. You need to be a master juggler when it comes to your time and...