Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It only takes a minute to sign up.
Sign up to join this community
My car's engine frequently stops in the middle of a ride. Its an old model of Hyundai Sonata 2004. This happens especially in high gears(3,4) and faster speeds (like 60-70 mph). It has also happened in the lower gears 1,2.
Now, when this happens, I slide the car on the side road using emergency lights and halt it. When I am restarting my car, I have to push the brake and gas pedal till the end to get the car starting again. There is nothing wrong with the battery.
If while trying to start the engine without pressing the brake, the engine turns over but does not start, then I would suspect a fault in the brake booster that is letting unmetered air into the vacuum circuit. This would cause a very weak mixture while the throttle is closed during starting, which would cause the problem you are having.
When you press the brake and open the throttle, this air leak may stop or become insignificant compared to the air flowing through the normal metered air intake path, so allowing the engine to start.
