I think the vacuum system in my 93 300D is messed up somewhere...

i heard that taking a reading of the vacuum will let me know if there is a leak or not...how do i go about doing this? where do i tap into in order to hook up a vacuum guage? what should the reading be?

thanks in advance...
Mario

A search under this topic will produce quite a bit of writing although much of it is for the 123's. I know because I've been through it with one of mine.

Look up "I hate automatic transmissions" by Larry Bible and you'll see some links.

Don

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DAILY DRIVERS:
'84 300DT 298k (Aubrey's)
'99.5 Jetta TDI IV 251k (Julie's)
'97 Jetta TDI 127k (Amber's)
'97 Jetta TDI 186k (Matt's)
'96 Passat TDI 237k (Don's
'84 300D 211k Mint (Arne- Undergoing Greasecar Conversion)

SOLD:
'82 240D 229k (Matt's - Converted-300DT w/ 4 speed

i had a little trouble on a 123 and the good mechanic at the dealer said that there is a small rubber elbow on the modulator that should be looked at first.

it was the root of all evil.

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g-wagen

where is this modulator located?

on the 123 it was on the side of the trans. follow the vaccume line down from the driver side bulk head.

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g-wagen