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: Q: Car misfires

One thing comes to mind with your car. There is a bulletin to solve a problem with fuel injector primary circuit codes. P0351-P0356. This may or may not repair the misfire, but it will prevent the false codes. If this...

Q: I can feel the front of my car shaking at 65 (or so) mph, especially if I am turning.

This may be related to out of balance tires or potentially an alignment problem. This may also be related to control arm bushings. When a tire or wheel is out of balance, this will cause a shaking as you describe...

Q: Possible valve seat loose

The valve seat is a part of the cylinder head and can not come loose. It is possible to have a broken spring, bent pushrod, or maladjusted rocker arm. This is all work that is associated with the repair you...

Related articles

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 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.