Vacuum pump test

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Vacuum pump test

XC90 '02–'15 General Forum for the P2-platform XC90 model

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May 16th, 2017, 14:56	#1
JohnL Senior Member Last Online: Apr 2nd, 2024 15:50 Join Date: Dec 2003 Location: Oise	Vacuum pump test I have a D5 2003 with a lot kms. I tested the vacuum pump today at idle, direct to the little pipe on the pump to my vacuum gauge and I only get 21" vacuum, and the clack clack is still audible with the oil filler cap off. I watched the video but the noise doesn't quieten down, so assume the pump is still working. What vacuum inches should I see here? I admit I haven't blanked off the connection to the brake servo. If this vacuum is low can the pump be repaired or does it have to have a new one? Any suggestions please. Update.... just taken off the servo pipe and blanket off and now get full vacuum, so would appear its the servo with a slight leak. John Last edited by JohnL; May 16th, 2017 at 15:32.

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