Pressure Test

WARNING: This page is about a different car, the 1991 Mitsubishi 3000GT and 1991 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.

Connect pressure gauges to input and output ports of the proportioning valve. See Fig 1 . Bleed brake hydraulic system. Refer to BLEEDING BRAKE SYSTEM .
Slowly depress brake pedal. Check readings on pressure gauges. Ensure output pressure begins to drop relative to input pressure at split point pressure range of 526-604 psi (37-42 kg/cm² ).
Continue depressing brake pedal and check readings on pressure gauges. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS table. If fluid pressures or split point are not within specification, replace proportioning valve.

Fig 1: Connecting Pressure Gauges to Proportioning Valve (Typical)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

PROPORTIONING VALVE PRESSURE SPECIFICATIONS

Application

Inlet Pressure psi (kg/cm² )

Outlet Pressure psi (kg/cm² )

Stealth & 3000GT

1138 (78)

⁽¹⁾ 744-815 (51-56)

⁽¹⁾	Maximum side-to-side pressure differential is 57 psi (4kg/cm² ).