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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1995MX-3 L4-1598CC 1.6L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONPRESSURE REGULATOR CONTROL SYSTEM
1995 Mazda MX-3 L4-1598cc 1.6L DOHC
Pressure Regulator Control System
1995 Mazda MX-3 L4-1598cc 1.6L DOHCSECTION Pressure Regulator Control System
View: System Relational Diagram:
PURPOSE
To prevent vapor lock in the fuel system during hot restart idle, a two stage pressure regulator is adopted.
OPERATION
Low Temperature Operation:
The vacuum to the pressure regulator (A and B ports) are cut (pressure regulator control (PRC) solenoid valve ON, PRC solenoid valve No. 2 OFF), and the fuel injection pressure is increased to 284 kPa (41 psi).
High Temperature Operation:
The vacuum to the pressure regulator (A port) is cut (PRC solenoid valve OFF, PRC solenoid valve No. 2 ON), and the fuel injection pressure is increased to 343 kPa (50 psi).
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.