Hi. What would be the likely cause of this.
After my 1990 Golf is idling for about 10 seconds, the RPM starts to go down bit by bit. After about 5 seconds, the engine stalls. On odd occasions, the idle is smooth for a lot longer than 10 seconds and the teetering is longer than 5 seconds but eventually the engine always stalls.
May or may not be relevant: If the car is coasting down an incline with the clutch in neutral, it stalls quickly and more frequently. There is a crack somewhere in the exhaust system. Otherwise, the car is in pretty good shape.
At first I thought it was clogged fuel injectors or some deposits in the crankcase. I tried cleaners that you add to oil and gasoline. They have made the idle smoother but the stalling has not improved
Thanks.