A properly functioning voltage regulator is essential for the fuel injection to behave properly. The OE voltage regulator in a type 3 is not the most reliable thing, and failure leads to the FI running very badly (almost undrivable). Changing the regulator is bound to happen sooner or later.
We got our new regulator from VW Heritage. The construction is significantly different from the original one, and it looks a lot more robust (all the components are potted). However, the body is 5mm wider, so it is a tighter fit, and the B+ terminal is very close to the bodywork (danger of shorting). This picture shows a side view comparing the old and new. The new one has 2 potted cans piggy backed.
What's more, later we realised that the whole outer case is D+, so when the engine is running, it will be at 12 to 14V. This could be dangerous if the regulator touches the underneath of the seat, or is too close to the side of the car and touches the body. Be very careful how you mount yours!.
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Bosch Voltage Regulators |
regulator in situ. |
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new and old |
showing D+ connected straight to the shell. (*) |
(in Spanish). (*) |
(*) Large picture - your browser may resize it. If it looks poor, view it real size.
Very work in progress.
Last updated on Thu Jul 21, 2005
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