Q: Car Intermittently Stalls

asked by on March 22, 2018

The car will run smoothly most of the time. When the engine has warmed up, the car intermittently stalls. It usually happens around 30 - 40 mph. I think this is not a limp mode. The car suddenly lost power. If I press the gas pedal, the engine rmp won’t go up but goes down and the car begins to choke back and forth. The car soon slowed down, and I had to pull the car to the side of the street and came to a complete stop. The engine then idled normally. However, if I press the gas pedal the car just choked and won’t run. Interestingly, if I shift to reverse and the car backed up smoothly. It seems the transmission was locked up to a higher gear and won’t rotate. Then I shut down the car, and within 3 sec I restarted – the car ran smoothly again.

The problem may be transmission related. Looks like a shifting problem. And heat is also a factor to consider. The car never stalls at cold, and only when it’s fully warmed up. Something resets itself when I shut down the car.

My car has 100000 miles.
My car has an automatic transmission.

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