Hey all, thanks in advance for the replies
The Car
2008 BMW Z4 M Series
60,000km
6-Speed Manual
Issue Key Points
- Misfire/Hiccup/Acceleration Cut Out
- Occurs when driving ~100kmph for a bit then once happens will occur at any speed driven.
- When Misfire/Hiccup occurs it feels like the throttle is cut in and out when the gas pedal is depressed but will not allow the car to accelerate or gain speed. Car will slowly drop in speed due to this.
- The problem is corrected when the car is turned off and restarted.
- No engine lights have come on during any of this
The Issue
Car is stored in a garage during winter and driven summer months. Started the car up yesterday fine and drives well without issue at lower speeds <60km.
When I was driving the car for a while (~20km) at highway speeds the car started to feel like it was misfiring (When I press on the gas pedal it feels like acceleration cuts in and out (misfire? Hiccup?) and would not allow me to go any faster and will slowly drop in speed due to this.)
When I shifted into lower gears/reduce to slower speeds it does the same thing. The thing is I pull over to the side of the road wait a bit then drive and it will drive fine for until I get past 50kmph or so and then the problem reoccurs.
Now the weird thing, when the car is turned off and then turned back on with no waiting it will drive fine again until I reach highway speeds and stay there. The car hasn't thrown any check engine lights or other lights on the instrument panel.