Skip the auto shop - Our mechanics make house calls

Q: White smoke and a knocking sound after fixing the diesel pump problem

asked by on

Ok, so I posted a question before about my car not starting and later found out that the diesel pump isn't spraying diesel into the injector, which has now been answered (thank you by the way). Fortunately the car now starts however now when it starts there is a lot of white smoke coming from the vehicle as well as a knocking sound coming from it, could you please advice on what or why you think this may be? Thank you in advance !
My car has a manual transmission.

A: Hello, thanks for writing in about your Toy...

Hello, thanks for writing in about your Toyota. If you are getting white smoke and a knocking sound it is most likely coming from the engine fuel injection. It's either out of timing or flooding the engine with too much fuel. The knocking sound is also due to this same issue. The white smoke you're seeing is un-burned fuel going out of the exhaust. If you need some help with this repair, consider having a certified technician, like one from YourMechanic, come to your home to diagnose the smoke and sounds for an accurate repair. Good luck.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: After oil change, car won't accelerate

Hello! From the pictures I've seen it seems like the drain plugs for the engine oil and the transmission fluid could be mixed up if not careful. Make sure the right fluid was changed by checking the level of the...

Q: How do you open the fuel door?

In order to fill your gas tank, you’ll need to open the fuel door. However, your fuel door is secured in order to prevent possible siphoning attempts. To open the fuel door, you’ll need to use the switch. Here’s how:...

Q: Car is making a knocking noise when stopping. Other mechanics say it's motor. Some say it's the piston

Unfortunately, there is no way to tell without doing some more testing. The timing and small details about the noises you are hearing may make a huge difference in diagnosing the issue. Lifters will make more of a "clicking"...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.
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.