Skip the auto shop - Our mechanics make house calls

Q: Car stalling at first start, black smoke from exhaust

asked by on

I've had troubles with my car stalling out, when I first try to start it in the morning with the engine is still cold. I went to the dealership several times with no answer to why this keeps happening. Now, I've noticed that there is a huge amount of black smoke coming from the exhaust. What might cause this? What kind of repairs can I expect?

A: Hello. There are a few possibilities for wh...

Hello. There are a few possibilities for why your car is stalling when you first start it. Your car’s coolant temperature sensor could be sending the wrong information to the PCM, which will cause the PCM to send the wrong amount of fuel to the fuel injectors. It is also possible that the mass airflow sensor is sending a false reading to the PCM as well.

The black smoke from the exhaust could be due to oil leaking onto the spark plug tubes and then being burned by the engine. If this is so, replacing the valve cover gasket and oil tube seals should solve that problem. Have a certified technician, like one from YourMechanic, come and complete a diagnosis in order to determine why your car is stalling first before proceeding with replacing any parts.

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: Hesitating and missing in drive or park, fine over 45 mph

Hello. Quite a few different items can cause an erratic idle as well as an engine that misses. The spark plugs and wires are a great place to start. Other possible causes of this fault include: low fuel pressure, vacuum...

Q: Dodge Ram 1500 Van won't start

Hello. There are several possibilities for your van not to start, and it looks like you already put in a lot of effort towards repairing this. I recommend having a technician check the condition of the spark plugs. Also, I...

Q: Car makes a "humming" noise when I try to start it

Hello. If you were to tap anywhere, it would probably be the starter solenoid, which has the main power wire attached to it, although it is not likely that tapping the starter solenoid will start the car. It sounds...

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.