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Eric
Eric, Automotive Repair Shop Manager
Category: Acura
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Experience:  20+ yrs. experience as repair shop manager and technician.
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How safe is to drive with a cylinder that is misfiring

Resolved Question:

How safe is to drive with a cylinder that is misfiring
Submitted: 5 years ago.
Category: Acura
Expert:  Eric replied 5 years ago.

Hi,

 

A single cylinder misfire is not likely to cause the engine to stop running on you, but there are short and long term negative effects of driving with an engine misfire:

 

  • poor gas mileage, a decrease by 25% or more in some cases
  • if misfire is allowing raw fuel into the exhaust system, damage to catalytic converter, O2 sensors
  • still trying to maintain speed you normally drive at with one cylinder not contributing increase engine temperature, which of course increases internal wear on engine
Customer: replied 5 years ago.

Thank you for your reply. This vehicle was involved in a rear end collision several days ago. Although the engine is not in the rear, could the shockwave from the impact caused this problem? Given the damage to the vehicle( the insurance company wants to total the vehicle) and the cylinder misfire that caused the check engine light to come on is it worth keeping the vehicle.

Expert:  Eric replied 5 years ago.

Hi,

 

While theoretically possible, it is extrremely unlikely that a collision to the rear end would be responsible for an engine misfire.

 

Honestly, no one online can determine whether your vehicle is worth keeping or not, just based upon your description of damage.

 

An engine misfire can be something as simple as a faulty plug, faulty injector, or faulty plug wire. You dont get rid of a car for an engine misfire.

 

If the insurance companies wants to total it, then you have to decide whether it is repairable or not if you decide to keep it. There could be frame damage that cannot be straightened adequately, or other damage that is not feasible to repair. You may be better off letting them total it

Eric, Automotive Repair Shop Manager
Category: Acura
Satisfied Customers: 24926
Experience: 20+ yrs. experience as repair shop manager and technician.
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Eric
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