11-09-2023, 12:01 PM
Regarding our 1971 low light Kombi – Stock standard dual port1600cc AD code motor with original single Solex 34 PICT-3 (flange No 299-2) carburettor and a Bosche 0231 167 049 / VW 113 905 205 AJ (DVDA) distributor. It has standard power assisted front discs brakes (i.e. brake servo unit with vacuum line from intake manifold).
Since having the carburettor & distributor rebuilt by ‘1500king’, the Kombi is much more drivable. Once it reaches operating temperature, the motor will idle at 900rpm purring like a kitten, while the vehicle is stationary.
However, I still have an issue with the motor stalling on occasions. When decelerating & braking (e.g. approaching stop lights), I depress the clutch pedal to change down gears and also before coming to a full halt, the motor will run very rough and often stall. There is no problem starting the motor immediately after a stall, and it will then idle perfectly, as before.
It seems there is something about the braking & decelerating motion that upsets the motor. I am guessing it is a fuel issue, but I am not sure. Possibly an air leak issue with the brake servo system but it all looks OK. Applying the brakes while the vehicle is stationary does not seem to stall the motor. Possibly a lean fuel mixture when the foot is off the accelerator pedal and using the motor to slow the vehicle? Just not sure.
This is an intermittent problem – but on my last run it was frustrating and embarrassingly frequent.
I thought I had read about someone else with a similar issue on this forum, but I cannot find the post now!
Any suggestions & words of wisdom would be greatly appreciated.
Since having the carburettor & distributor rebuilt by ‘1500king’, the Kombi is much more drivable. Once it reaches operating temperature, the motor will idle at 900rpm purring like a kitten, while the vehicle is stationary.
However, I still have an issue with the motor stalling on occasions. When decelerating & braking (e.g. approaching stop lights), I depress the clutch pedal to change down gears and also before coming to a full halt, the motor will run very rough and often stall. There is no problem starting the motor immediately after a stall, and it will then idle perfectly, as before.
It seems there is something about the braking & decelerating motion that upsets the motor. I am guessing it is a fuel issue, but I am not sure. Possibly an air leak issue with the brake servo system but it all looks OK. Applying the brakes while the vehicle is stationary does not seem to stall the motor. Possibly a lean fuel mixture when the foot is off the accelerator pedal and using the motor to slow the vehicle? Just not sure.
This is an intermittent problem – but on my last run it was frustrating and embarrassingly frequent.
I thought I had read about someone else with a similar issue on this forum, but I cannot find the post now!
Any suggestions & words of wisdom would be greatly appreciated.