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 MANUALSMAZDA1993B2200 BASE, 2D PICKUP EXTRA CAB, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMFUEL PRESSURE (FUEL INJECTION)FUEL PRESSURE
1993 Mazda B2200 Base, 2D Pickup Extra Cab, Automatic
Fuel Pressure
1993 Mazda B2200 Base, 2D Pickup Extra Cab, AutomaticSECTION Fuel Pressure
- Disconnect circuit opening relay. See CIRCUIT OPENING RELAY LOCATIONS table.
- To bleed down fuel in system, start engine (if possible) and allow to die. Connect pressure gauge to fuel line at fuel filter. Reconnect circuit opening relay.
- On Navajo, install EFI Pressure Gauge (T80L-9974-B) to relief valve. Relief valve is located on fuel supply manifold.
- Turn ignition on. On Miata, MX-3, MX-6, Protege, RX7, 323, 626 and 929, jump test connector terminals Fp and ground. On all other models, use a jumper wire and connect terminals of Yellow fuel pump check connector together. See FUEL PUMP CHECK CONNECTOR (YELLOW) LOCATION
table. On all models, if pump does not run, check fuel pump circuit and circuit opening relay.FUEL PUMP CHECK CONNECTOR (YELLOW) LOCATION
Application Location B2200 (PFI) & B2600i On Firewall, Near Windshield Wiper Motor MPV Near Airflow Sensor Navajo At Right Inner Fender Panel - If possible, start engine. Check fuel pressure with vacuum connected to and disconnected from pressure regulator. See REGULATED FUEL PRESSURE (FUEL INJECTION) table. Turn engine off and disconnect jumper wire at fuel pump check connector. Wait 10 minutes and ensure residual pressure is at least 21 psi (1.5 kg/cm2).
- Operate fuel pump by jumpering fuel pump test connector. Check fuel pump performance. Pinch hose between pressure gauge and fuel filter. DO NOT hold longer than necessary to check pressure. See FUEL PUMP PERFORMANCE table. If pump does not meet specifications, check fuel pump circuits, fuel pump, fuel tank, fuel filter and repair or replace as necessary.
FUEL PUMP PERFORMANCE
| Application | Pressure | ||||
|---|---|---|---|---|---|
| Navajo | (1) | ||||
| MX-6 & 626 With 2.5L | 72-92 psi (5.0-6.5 kg/cm2) | ||||
| All Others (2) | 64-92 psi (4.5-6.5 kg/cm2) | ||||
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REGULATED FUEL PRESSURE (FUEL INJECTION)
| Application | At Idle W/ Vacuum psi (kg/cm2) | At Idle W/ Vacuum psi (kg/cm2) | ||||
|---|---|---|---|---|---|---|
| B2200 (PFI) & B2600i | 28-37 (2.0-2.6) | 38-46 (2.7-3.2) | ||||
| Miata, MX-6 & 626 | 31-38 (2.2-2.7) | 38-46 (2.7-3.2) | ||||
| MPV | 30-37 (2.1-2.6) | 38-46 (2.7-3.2) | ||||
| MX-3, Protege & 323 | 30-37 (2.1-2.6) | 38-46 (2.7-3.2) | ||||
| RX7 | 27-32 (1.9-2.3) | 36-38 (2.5-2.7) | ||||
| Navajo | (1) | (2) | ||||
| 929 | 31-38 (2.2-2.7) | 38-46 (2.7-3.2) | ||||
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NOTE:
Fuel pump control unit terminal identification is not available.
RENDER: 1.0x
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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.