Skip the auto shop - Our mechanics make house calls

Q: Car won't run after running rough

asked by on

I started my car after work and noticed it was running rough while it was idling. It also had thick white smoke coming out of the exhaust, smelled like used fuel, and didn't have much power. Once I got it home, I turned it off and started it back up, and all I could hear was metal clinking. Now, the car won't start. I checked and the battery is fine.

A: Hello, from your description it sounds like...

Hello, from your description it sounds like you might have fuel injector that is stuck open. A stuck open fuel injector will let fuel just flow into a particular cylinder, letting raw fuel just go strait into the exhaust without being burned in the cylinder. You say that it won't start which might be an indication of the engine being hydro locked. There should have been a Check Engine Light on, if not flashing while this was happening. Now that the engine won't spin with the starter, the spark plugs will have to be removed, and the engine turned at the crank to see if the engine spins. This will also force any fluid out of the cylinder safely. If the engine doesn't spin, then the engine is seized or locked up due to a bent rod. If you would like have this inspected by a professional, YourMechanic can come to your home or office to diagnose your engine's rough idle for you.

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・Save up to 30%

Get a quote

What others are asking

Q: Car stalling and not restarting.

The car not starting and the blower staying on is two different problems. First the stall and then no start could be on or more problems with this vehicle. The fuel pump, crank sensor or ignition modules were all problems...

Q: Lights went out while driving

If fuses and relays are good, there are other possible causes. The ignition switch may have failed internally. If the circuitry inside the electrical portion of the ignition switch has a break or short, it can cut power to the...

Q: Battery gauge and dash lights need replacing.

Since you are having intermittent problems with various parts of the instrument cluster, it's very likely that the cluster assembly needs to be replaced. A qualified technician, such as one from YourMechanic, will be able to diagnose this for you....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...