Q: Van shaking and misfiring.

asked by on

Van misfires and shakes a lot. The machine gives me a code P0300. I think it might be a combustion problem.

Hello, a P0300 is a general misfire code without pointing to any one cylinder. There should be more codes present indicating which cylinder(s) have a misfire condition. You are correct in stating that a misfire is a combustion concern. To have a misfire there has to be a lack of ignition or a lack of fuel. The basics need to be checked, fuel psi, fuel filter (should be replaced at max every 2 years), condition of the distributor cap and rotor, spark plug and wire condition. If all the basics are good, then it would be time to connect a scanner and see what is going on, and what the computer is seeing. You may need to enlist the aid of a mechanic to help narrow down the cause.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Van shaking and misfiring.

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: The truck is shaking at takeoff and stops

Shaking or vibrating may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal...

Q: Check Engine light on due to misfire

Code P0301 indicates a misfiring issue. You likely need an ignition coil. There is a possibility that oil is leaking into your valve cover, which is causing this. If you haven't replaced the spark plugs, you will need to soon....

Q: Leaking water pump

Hello. It is common for the water pump to randomly fail on this engine. If it is leaking then it needs to be replaced. I typically start by replacing the pump and then doing a cooling system pressure test to...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...