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Replying to your question : I had no pressure swtch installed in my car so I have no holes in my runners. What is this made of ? A rubber diaphram ? I thought this was the vacume activated kickdown switch but I maybe wrong. The only switch I know on the right side is the one on the throttle shaft. I did no mods but just add the throttle switch as the bently manual shows. This switch performs the enrichment function. I am a bad boy and have experimented on Pressure sensors from different brands of cars and swapped the guts and they all work satisfactorly if you make them adjustable. Vacume input to all of these is the same for any car but the "leaf" spring inside and the diaphram have varing stiffness between car brands and models to adapt to engine characteristics for example : more rich during takeoffs or passing for engines with factory made weak design low end or high end rpm, different compression. My pressure sensor that I am using now is from a type 4 with a volvo diaphram and mixture adjusted for my car. You can stick to the Pressure sensor part number that ends in 001 or 007 that works for these cars. I also have a new 007 and seems to be a little too lean for me but works beatifully with no adjustment out of the box. I hope I am right about these part numbers, I forget. Are you sure that richness switch is not another type of tranny kickdown switch ? Can anyone verify this ? The Bently manual does not show this switch as part of the EFI. Or am I wrong. On Sun, 08 April 2001, "Leon Martinez B." wrote: > My car is a 1969 and I set my car up with the > throttle pump feature using a newer throttle valve switch > and a " C " brain . I just wired it up like it should. Hey Leon, did you change any other features of your '69 system to make the "C" brain work?? Did you change your pressure sensor? And I guess the newer style throttle valve switch you are running takes over the function of the pressure switch, so I guess you are not running the pressure switch anymore? (Pressure switch being the thing under the RHS air intake runners that enriches the mix for full throttle.) Did you plug the hole in the manifold for the pressure switch? -Mark Fuhriman '69 Fastback ------------------------------------------------------------------- Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe