Ford — Intake Manifold Vacuum Test
Testing & diagnosis
From a Ford service manual — check it applies to your exact model before use.
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Procedure
- Bring the engine to normal operating temperature.
- Connect Rotunda Vacuum/Pressure Tester 059-00008 to the intake manifold.
- Run the engine at the specified idle speed and read the vacuum gauge.
Tools required
- Rotunda Vacuum/Pressure Tester 059-00008 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Vacuum should read between -51 and -74 kPa (15 and 22 in-Hg)
- Subtract 5.5 kPa for every 500 meters above sea level
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.