It depends on which distributor and transmission you have. The stock distributor has one vacuum line going to it. An autostick transmission has one line. If you have a manual transmission and a Bosch 009 distributor like most people do, you have no vacuum lines.
1973 , 48hp , 1600cc
1973/74 1600cc - 8mm head studs with case savers
i dont know about an engine with AM but AE 1971/72 1600cc - dual relief, dual port AH 1973/74 1600cc - 8mm head studs with case savers AJ 1975-1979 1600cc - fuel injected AW 1973/74 1800cc - dual carb. AW 1975 1800cc - fuel-injected
They Can 30 mpg or more if the carb and engine are tuned properly
i dont know of any engines that started with AK however AE 1971/72 1600cc - dual relief, dual port AH 1973/74 1600cc - 8mm head studs with case savers AJ 1975-1979 1600cc - fuel injected
Sounds like a vacuum leak.
your 73 has a 1600cc dual port engine check the number stamped in the alt/ gen stand and refer to the mur s book .
i dont know of any engines that started with AD however type1 AE 1971/72 1600cc - dual relief, dual port AH 1973/74 1600cc - 8mm head studs with case savers AJ 1975-1979 1600cc - fuel injected type2 AW 1973/74 1800cc - dual carb. AW 1975 1800cc - fuel-injected AP 1974/75 1800cc - European only type 3 AN 1974 1800cc - 8.6:1 compression AT 1974 1800cc - European only, dual carb.
AH 1973/74 1600cc - 8mm head studs with case savers http://www.thesamba.com/vw/archives/info/engine_letters.php Hope this helps, James
Try Your Local Automotive Store or Buy A Book On That Vehicle And The Diagram Should Be In The Book < $14.00 -- $20.00 But Make Sure Be You Purchase It.
I don't have any diagrams, perhaps someone else will have one, but the older models didn't have many lines. There would be a spark-ported line from the distributor to somewhere along the main body of the carb, usually about half-way up the body. A vacuum guage would show little to no vacuum at idle and more vacuum at part-throttle. There would also need to be a large vacuum line from the power brake booster to either the intake manifold or the throttle body of the carb, depending on the year, and another for the pcv valve. These would use a 3/8" nipple. You'd need another line (also a continuous source) to the transmission if it's an automatic. Some models may have a vacuum actuated choke and possibly a source for disappearing headlights. Can't think of anything else.
a vacuum leak.