Skip the auto shop - Our mechanics make house calls

Q: My truck has a violent shake, rapid onset, massive white smoke, increases shaking with turbo charger pressure increase, and has an error code of p0303.

asked by on

while driving at 70mph, suddenly truck started shaking violently and blowing huge clouds of smoke which increased as turbo pressure increased, decreased as pressure decreased, minimal but still present at idle. Very hard idle, difficult starting, increased shaking with increased rpms. No engine light came on, code reader shows error P0303 #3 cylinder misfire. No freeze data noted. Injectors replaced aprox 1 month ago. Has had an odd time shutting off over past 2 months where it sputters for a sec after key shut off. Worked fine up to incident. I have aprox 1000 miles on new injectors. I am at a loss. Please help.

My car has 158000 miles.
My car has an automatic transmission.

A: Hi there. If you are having a misfire on c...

Hi there. If you are having a misfire on cylinder number 3 and the injectors are new with the fuel lines cleaned out, then the exhaust valve is burned on cylinder number 3 and needs replaced. This is why there is white smoke in the pipe. White smoke on a diesel engine is unburnt fuel from the misfire. If you need further assistance with the vibration and a misfire on your diesel engine, then seek out a professional, such as one from Your Mechanic, to help you.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: How do you know if you just need the bearings repacked or the entire assembly replaced?

In order to know if there is additional hub damage then you will need to disassemble the hub and inspect bearings and races. If bearings are bad then it may damage the hub.

Q: Repeated Fuel Injector Seal Failure

O-rings on fuel injectors have to be liberally lubricated with engine oil prior to installation. Installation is typically made with a twisting motion as you push the injector into the bore on the fuel rail. Be sure the aluminum surface...

Q: No fire after changing injectors... What could be the problem?

Check to be sure there are no leaks in the return line. A leak in this can cause air to get into the injection pump causing no-start issues. There is a rubber hose on the back of the injection pump...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.