
Driving with a misfire is risky and not recommended. While you might be able to drive the car a short distance to a repair shop in an emergency, continuing to drive regularly can cause severe and expensive damage to your engine and its emission control system. A misfire occurs when one of the engine's cylinders fails to fire properly due to an issue with spark, fuel, or compression. This imbalance puts extra strain on the engine and can ruin the catalytic converter, a very costly component to replace.
The immediate signs of a misfire are hard to ignore. You'll typically feel a distinct shaking or vibration, especially at idle, and the car will feel noticeably down on power. The check engine light will often flash, which is a specific warning of a catalyst-damaging misfire, as opposed to a steady light. The smell of unburned gasoline from the exhaust is another common clue.
The root causes vary widely. It could be something relatively simple and inexpensive, like a worn-out spark plug or a faulty ignition coil. On the other end of the spectrum, it could be a more serious issue like low compression from internal engine damage. Because the potential consequences are so severe, the safest and most cost-effective plan is to have the car diagnosed by a professional as soon as possible. They can read the diagnostic trouble codes from the engine computer to pinpoint the faulty cylinder and identify the specific component failure.

I had this happen last year. The car was shaking like crazy, and the check engine light was blinking. I called my mechanic, and he told me to get it towed. He said driving it even a few miles could fry the catalytic converter. It turned out to be a bad ignition coil, which was a fairly cheap fix. Don't risk it; the tow is cheaper than a new catalytic converter.

Think of your engine as a team. A misfire is like one player sitting down on the job. The rest of the team has to work harder, and the whole system is off-balance. This extra strain can lead to bigger problems. The unburned fuel can also overheat and destroy the catalytic converter. It's best to address the weak player immediately before the whole team suffers.

From a purely financial standpoint, driving with a misfire is a bad gamble. The cost of a tow or a mobile mechanic is a fixed, relatively small expense. The cost of ignoring the problem is unknown but potentially very high. Replacing a failed catalytic converter can easily cost over a thousand dollars. You are betting a small, known cost against a large, unknown one. It's not a smart bet.

If you absolutely must move the car, say, from a dangerous spot to a safe one a block away, do so with extreme caution. Drive slowly and avoid any acceleration. Understand that this is still a risk. The best practice is to call for a tow truck or a mobile mechanic to diagnose the issue on the spot. Modern cars are complex; what feels like a small problem can quickly escalate into a major repair bill.


