Stalling Problem

The engine always starts first time when cold, and is fine for the first 5 mins. Then as its starting to warm up, when you come to a stop it stalls and wont restart immediately  :cry: . Usually it takes about 3-4 mins of re-trying. Then once it reluctantly fires, its fine again. Its been doing this almost every time i drive it, apart from when i can remember to left foot brake and keep the revs up with my right foot. Any ideas?

Sounds like the age old VW problem of carburettor icing?..

Is it OK when its fully warm, say after 10mins or 5+ miles? If so make sure the preheat pipe is connected between the tinplate on the exhaust manifold and the air filter inlet pipe. If it is stick your hand under the rear of the air filter and check that the two small rubber pipes are connected to the underneath of the air filter. One goes back to the carb and the other to the flap in the inlet pipe where the preheat pipe comes from. It controls a flap so that warm air is sucked in from the exhaust manifold.

Yeah fine after 10 mins, but fine to begin with too, then after 5 mins it sometimes dies. If i leave the choke on  longer than i'd have thought it kind of sorts it, its if i have to stop suddenly, ie engine goes from say 5000 rpm to idle quickly.
I'll follow your instructions and check the pipes, cheers.

I had this issue with my 1.3 years ago, and the guy at the garage said that the mixture was very weak - he reckoned that the carb was worn, and that it had been set really weak to pass the MOT emissions.

We turned it up, and it ran well, but was too rich (sooty spark-plugs and exhaust pipe-tip, bad MPG, and would have failed the next MOT), so the long term solution was to get the carb re-built - about ?100)

It might not be the cause of your problem, but get the mixture checked, to be sure.

The mixture should be 1.5% +/- .5% (VW spec). The MOT pass point for an early eighties car is 4.5% (unless it's changed recently).

Ahhh, sounds very possible. My car has a 2 year old weber 31 pic carb and mpg isnt very good, so perhaps it need a quick look at. It has idle and mixture adjust on it i'd guess ?

Your carb should not be worn if only two years old. Do you know who fitted it? Quite possible carb wasn't fitted that well or they didn't use fresh gaskets.

Cheers

markwon said

Your carb should not be worn if only two years old. Do you know who fitted it? Quite possible carb wasn't fitted that well or they didn't use fresh gaskets.

Cheers

No idea on either of those MW, i know the prev owner and he would definitly have paid a proper garage to do it. He said that the orig carb developed a hole in it and needed replacing, the only new carb he could get was the weber from GSF. He said that fuel economy was never quite as good after that .