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・Fair and transparent pricing

Get a quote

What others are asking

Q: Car loses power uphill, makes clanking sound - 1995 Chevrolet Corsica

Hey there. You don't mention the conditions under which the "clank" occurs - while accelerating, cornering, braking, etc., but I would have a professional mechanic like YourMechanic check out your vehicle. Loss of power could be a clogged catalytic converter,...

Q: Upgrade 4 barrel carburetor - 1989 Jeep Grand Wagoneer

I believe your Wagoneer has a "bimetallic choke coil" choke coil actuator (non-electric), so, you would have to add an electrical source that is "hot" when the ignition key is in the Start or Run position. Some Wagoneer models came...

Q: Have an electrical issue under driver side 2000 Jeep Cherokee Laredo

Hello - the block connectors you describe are no doubt part of the vehicle wiring harness, and are likely not available as separate components. In addition to repairing the fender (or fender liner) hole you mention that is causing water...

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 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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...