Q: Intermittent cylinder number four misfiring, car shakes as if it would stall

asked by on

My car has intermittent cylinder misfiring. It always happens on the same cylinder, number four. It seems that every time that happens, my car shakes and wants to stall. I replaced the fuel filter, the spark plugs and I've done oil change. The problem comes and goes.

Misfiring can generally be either the fuel or it can be ignition. Now, you’ve changed the spark plugs. But if you have an older car, did you change spark plug coils? If not, change them. If it has coil on plugs, change the coil on plug assembly on the number four cylinder.

If it still has misfire, then what you can do would be to swap the number four fuel injector with another one, like injector one. Then, if the misfire changed to number one, you’d know it was the fuel injector that was bad.

Now, if it’s beyond that, then this really begins to get complex and you’d be better off enlisting a certified mechanic, such as one from YourMechanic. Because, it could be the intake manifold leak, a blown head gasket, weak valve things. Those are all things that really take a mechanic to comprehend and thoroughly diagnose the engine misfire in person.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Intermittent cylinder number four misfiring, car shakes as if it would stall

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: Unable to start after it rains or misfires until the engine heats up in high moisture conditions

Hey there. This misfire no-start in wet or damp weather is going to be caused by the ignition system of the engine. In order to isolate the cause you can remove the inside engine cover and then start the van....

Q: Car feels like it's going to stall.

This is a common symptom of a misfire or potentially a faulty idle air control valve which when faulty, can cause the misfire to happen due to an improper air/fuel mixture being supplied to the engine. The idle air control...

Q: Cylinder number 4 is misfiring black dry carbon on spark plug code P0304

Hi there. It would appear you have covered all the bases replacing components for your P0304 engine misfire. As you already know, replacing components can be expensive and time consuming without resolution. Assuming the engine is mechanically sound, good cylinder...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...