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Vacuum Modulator Rod

WARNING: This page is about a different car, the 1989 Isuzu I-Mark, 1988 Isuzu I-Mark, and 1987 Isuzu I-Mark. However, it is still accessible from the selected car via links, so may be relevant.

To determine correct vacuum modulator rod length, measure dimension "N" at transaxle. See VACUUM DIAPHRAGM ROD SELECTION  table for correct rod to select. Also, see Fig 1.

VACUUM DIAPHRAGM ROD SELECTION

Dimension "N" In. (mm) Rod Length In. (mm)
Below 1.00 (25.4) 1.16 (29.5)
1.000-1.020 (25.4-25.9) 1.18 (30.0)
1.020-1.039 (25.9-26.4) 1.20 (30.5)
1.039-1.059 (26.4-26.9) 1.22 (31.0)
Over 1.059 (26.9) 1.24 (31.5)
Fig 1: Adjusting I-Mark Modulator Rod Length
G82816Courtesy of ISUZU MOTOR CO.