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Does anyone have any experience of vacuum control problems on a 1990 Golf mkII 1.6 Pierburg 2E2 carburettor? I don't think the choke pull down unit on the one i have is functioning correctly, i've had to reverse the bleed valve connected to the servo vacuum line in order to make it work. The pull-down unit is okay, I think. Is it anything to do with somrthing on the carb. called a waxstat/expansion element?
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Dear Tim,
The "bleed valve" you refer to is in fact a one-way vacuum hold valve, and is frequently fitted the wrong way round, so that it does not allow vacuum into the choke pull-down system (this is because it is shown the wrong way round on the under-bonnet plumbing diagram - don't ask !!). Test the pull-down unit by applying vacuum to the upper port whilst blanking off the lower port - it should hold vacuum indefinitely with the rod withdrawn. The degree of choke reduction can be adjusted by the allen screw in the ned of the rod. The "wax-stat" is entirely sparate, and controls the "fast-idle" start-up rpm. This unit is a common problem as it gets older, causing the rpm to remain high too long. There is an adjustment by means of the allen screw on the cam linkage behind the waxstat unit, but if rpm remains high with this fully adjusted there is no alternative to renewing the waxstat unit.
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Hello !
We had the same problem on a Jetta 1.6, the waxstat costs £ 41.13 - part number is 027129243. These carburettors are a nightmare once they start to play up and and they cost approx 200 quid to replace. which may be the best option unless your mechanic knows them inside out.
Don't under any circumstances go to the VW Main dealer, they are not interested in fixing your car, but they will try to find as much wrong with it as possible until you conclude that it is not economical to keep it and buy a new one from them.
I've had 3 Jettas, 1 Golf, 2 Sciroccos and 2 Passats. They have nearly all succumbed to carburettor problems. Most have been kept until they fell to pieces, ( one passat had the cambelt break at 210.000 miles) and they have not being particularly unreliable and seem well built, but the biggest problem is with the dealers attitude not the cars.
Fortunately there are some good private VW specialists about.
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ADAM, YOU'RE TOO GOOD.
SEND YOUR DETAILS TO webmaster@honestjohn.co.uk AND EVEN THOUGH YOU'RE A MOBILE GARAGE, HE'LL INCLUDE YOU IN OUR GOOD GARAGE GUIDE.
HJ
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