Black Smoke Coming Out Of Your Tailpipe? Find Out Why


Your expect your car to run perfectly, but sometimes issues arise, like black smoke coming out of your tailpipe. This could signify all kinds of issues that this guide might help you uncover, and you'll learn about one possible solution.

What is The Smoke?

The black smoke coming out of your tailpipe is fuel that your engine could not burn during combustion. This means that the engine (or other parts) of your vehicle is causing your fuel pump to push out more gasoline than needed.

What Could Be Causing The Rich-Fuel Issue?

The following are possible issues related to an engine that is running rich:

  • The problem could be a clogged fuel return line that is not allowing your engine to return the unnecessary gasoline.
  • Your fuel injectors might be going out, especially if you haven't had a tune up lately.
  • The air filter might be clogged, or you might need to replace the filter with a new filter.

These are just some of the possible reasons you are seeing black smoke coming from your exhaust, but there are other possibilities, like a bad fuel pressure regulator.

How To Tell If the Problem Is Your Fuel Pressure Regulator?

The first thing you can do is simply talk to an auto care specialist, like Allan's Alignment & Frame Service (1989) Ltd auto repair, before dealing with your fuel pressure regulator, as he or she can confirm your suspicions. Or you can try to figure it out on your own. The following are other symptoms that are usually connected to a bad pressure regulator:

  • The spark plugs look black because the extra fuel is contaminating other areas in your vehicle.
  • Your car might start to run a little erratically at times.
  • Your vehicle does not start as it normally would, or the car stalls on you.
  • The oil dipstick smells like gasoline.

Talk to your auto care specialist if you notice any of the aforementioned signs so that he or she can help you fix the problem.

Replacing Your Own Fuel Pressure Regulator

Follow the steps below:

  1. Park in a safe location that is leveled and away from traffic.
  2. Let the vehicle cool so that you can work on it safely.
  3. Use your owner's manual to find and disconnect the fuel pump relay from the fuse box.
  4. Disconnect the red or negative line from our battery; this is for your protection.
  5. Use the owner's manual to find the fuel pressure regulator, which usually looks like a hexagon and sits on the driver's side.
  6. Disconnect the lines leading up to the regulator and the electrical-like plug.
  7. Remove the screws using your socket and wrench tool.
  8. Replace with your new regulator, and reconnect all the necessary lines and electrical plugs.
  9. Reconnect your fuel pump relay, followed by your battery, and you are done.

Hopefully taking care of this black smoke problem is more manageable now that you have a little more knowledge.


4 February 2016

does your car need a tune up?

When someone says that their car just had a tune up, what does that consist of? This was a question that I have had to answer time and time again. Many people wonder why the vehicle that they drive doesn't get the same good gas mileage that it used to or why it doesn't seem to run as smoothly. In some of these cases, all the car needed was to have a good tune up. This blog will explain each step of a tune up and help you decide if it is time for your car to go in to the mechanic to get one.