Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1991RX-7 BASE, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSAIR INDUCTION SYSTEMS (TURBOCHARGER)BOOST PRESSURE
1991 Mazda RX-7 Base, 2D Convertible, Standard
Boost Pressure
1991 Mazda RX-7 Base, 2D Convertible, StandardSECTION Boost Pressure
- Disconnect air hose between intercooler and solenoid valve. Connect pressure gauge. See Fig 1 . Plug duty solenoid side of hose. Warm engine to normal operating temperature.
- Measure boost pressure while suddenly increasing engine speed. At approximately 4000 RPM, boost should begin. At greater than 5000 RPM, boost pressure should be more than .7 psi (0.049 kg/cm2 ). If boost pressure is not within specification, proceed to following tests as necessary.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.