There’s nothing like the sound of a smooth-running Mustang—until something starts to feel off. If your Mustang is idling rough, shaking while driving, or misfiring when you hit the gas, there’s definitely something going on under the hood.
So, what causes a Mustang to run rough or misfire?
Common Reasons Your Mustang Might Be Struggling
Here are a few usual suspects:
- Worn Spark Plugs or Ignition Coils
These are some of the most common causes of misfires. If the spark isn’t strong enough or not timed right, your engine won’t run smoothly. - Vacuum Leaks
A cracked or loose hose can throw off the air/fuel mixture and cause rough idling or hesitation. - Dirty Fuel Injectors
Over time, fuel injectors can get clogged up, which leads to uneven fuel delivery—and that can cause your engine to sputter or misfire. - Sensor Issues
Bad oxygen sensors or mass airflow sensors can send the wrong signals to your Mustang’s computer, messing up performance and efficiency. - Fuel System Problems
Low fuel pressure or a clogged fuel filter can leave your engine gasping for power.
How We Can Help
At John’s Auto Care in Boulder, we specialize in diagnosing engine performance issues—especially on muscle cars like the Mustang. One solution that works wonders for rough-running engines is our BG Fuel Injection Service.
This service cleans out carbon and buildup from your injectors, restoring proper fuel spray and engine smoothness. It’s like a deep clean for your Mustang’s fuel system—and our customers often feel the difference right away.
Don’t Wait—It Won’t Fix Itself
If your Mustang isn’t running the way it should, don’t just live with it. A small issue now can turn into something more expensive later. Our experienced mechanics can pinpoint the problem and get your car back to running strong in no time.
👉 Call or schedule your appointment online today. Let the team at John’s Auto Care take care of your Mustang like it’s one of our own.