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 MANUALSMAZDA1999PROTEGE ES, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESFUEL SYSTEMFUEL PRESSUREFUEL PRESSURE REGULATOR HOLD PRESSURE
1999 Mazda Protege ES, Automatic
Fuel Pressure Regulator Hold Pressure
1999 Mazda Protege ES, AutomaticSECTION Fuel Pressure Regulator Hold Pressure
- Disconnect negative battery cable. Install fuel pressure gauge in fuel supply line. Reconnect negative battery cable.
- Locate data link connector in left side of engine compartment. Connect a jumper wire between data link connector terminals F/P and GND. See Figure. Turn ignition on for 10 seconds to operate fuel pump. Turn ignition off and disconnect jumper wire. Carefully pinch fuel return hose closed. Wait 5 minutes and observe fuel pressure.
- Fuel pressure should be more than 21 psi (1.5 kg/cm2 ). If fuel pressure is not as specified, replace fuel pressure regulator.
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.