Q: Misfires at high speed on a high way
The car moves smoothly at high speed up to 100miles per hour, but when I push the pedal down (kick down) to overtake other vehicles the engine misfires, showing check engine light. When l reduce speed a little, the engine regained full power and the check engine light disappears from the dashboard. Best regard.
My car has 100000 miles.
My car has an automatic transmission.
Recommended Services
| Engine is misfiring Inspection | $94.99 - $114.99 | Get a Quote |
Hello there, a few common faults will cause your 2004 BMW 540i to have a misfire on acceleration. Without knowing what code the engine is storing I can only offer general advice. Likely causes for the car to misfire like this would be the fuel pump, fuel filter, spark plugs, coil pack, throttle body faults, or a wiring harness issue. Since the problem only occurs when the pedal is pressed at first this tells us a part is on its way to failing, but has not fully yet. A qualified Technician such as one from YourMechanic will be able to diagnose your misfire condition and make any repairs required to resolve the issue.
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