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Home > Tdi > Vacuum controller pipe connections - pierberg 7.21903.00
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RoverAndOut



Member Since: 24 Feb 2025
Location: Somerset
Posts: 4
United Kingdom 
Vacuum controller pipe connections - pierberg 7.21903.00
Greeting All. I wonder if anybody can help me. I have changed the master and slave cylinder on my 1997 300tdi 110 CSW. All seems good (to great relief) on this but i have bumped off one of the pipes from the what I think Pierberg vacuum controller (pictured) Its the lowest tube (below the blue ringed egr) and cannot figure out where it goes at the other end. The pipe is in quite bad condition (split at the non cotroller end) so probably will look to replace too as I think will probably be leaking.
Post #1068895 1st Jun 2025 6:00pm
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RoverAndOut



Member Since: 24 Feb 2025
Location: Somerset
Posts: 4
United Kingdom 
Solved
Ha! To answer my own question. Turns out the loose pipe was from the EGR modulator ERR3314 and connects to the "T" connector on vacuum pipe.
Post #1068960 2nd Jun 2025 4:24pm
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