Q: Engine misfiring, black smoke out of tailpipe

asked by on

The truck has difficulty starting up in the morning, after it sat the whole night and the engine is cold. The tailpipe starts blowing black smoke. The engine is misfiring as well. It runs rough for several minutes and then when the truck gets warmed up, it runs well. What could be the problem?

Hello. The conditions you described could result of a fuel injector o-ring leakage, a fuel injector control module intermittent failure, or a glow plug failure. I would also recommend checking the electrodes on the spark plugs. Get some help from certified technician, such as one from YourMechanic, who will easily be able to provide an accurate diagnoses of your misfiring issue and perform the necessary repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Engine misfiring, black smoke out of tailpipe

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 would cause the ABS, VDC, and SLIP lights to come on?

This may be a couple of different possibilities such as faulty wheel sensors or potentially a faulty ABS pressure switch. Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying...

Q: The turn signal blinks rapidly so I replaced and it worked ok but then blinked rapidly again after awhile then rapidly again.

What you are describing sounds like a bad turn signal flasher. The flasher unit is an electrical unit that is usually located under the hood and is wired with the turn signal lights. This flasher sends short intermittent bursts of...

Q: Rocker arm would i know about it or car be normall

A broken rocker arm would definitely make a lot of noise and cause a constant misfire in the cylinder it is related to. My best advice would be to hire an experienced technician to look over the work to see...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.