Mazda 2003 B4000 Bedienungsanleitung PDF herunterladen

MA93

MA014 Mazda Reference

Subject: Fuel system pressure testing for fuel injected engines

Symptom: Hard starting cold, power loss climbing hills, overall poor

performance, engine surges and then stops running

Source: Mazda service manuals and technicians

Risk of fire.

• Wear safety goggles and protective clothing, user and bystander.

• Relieve fuel system pressure before opening lines and connections.

• Keep cigarettes, sparks, open flame, and other sources of ignition away from

vehicle.

• Keep food out of area when fuel is present.

• Disconnect the battery ground before opening any fuel system fittings, reconnect

the cable to run the engine or operate the fuel pump for testing.

• Gasoline, methanol and oxygenated fuels are toxic and flammable and must be

handled appropriately.

• Keep a dry chemical (Class B) fire extinguisher rated for gasoline, chemical, and

electrical fires in the work area.

Fire can cause serious injury.

IMPORTANT:

The fuel system remains under pressure when the engine is not running. Release fuel

pressure before disconnecting any fuel line to reduce the chance of personal injury or fire

damage to vehicle components.

IMPORTANT:

Strict observance of posted speed limits and attention to driving conditions are mandatory

when conducting fuel pressure testing while road testing.

IMPORTANT:

Late model fuel lines use plastic snap-lock connections that are easily damaged. The fuel line

must be replaced if the snap-lock connection is damaged when it is disassembled to install a

fuel pressure gauge. The sealing O-rings should be replaced whenever a connection is

opened.

NOTE:

i Operating with a low fuel level may overheat the electric fuel pump. Mazda advises that low

fuel level in the tank may damage the fuel pump.

The ECM-PCM controls ground to the fuel pump through a relay.

RX-7 models with fuel injection use a dual primary-secondary injection system controlled by

the ECM. Each injection pipe has two injectors. These systems use an electric in-tank fuel

pump.

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Inhaltsverzeichnis

Seite 1 - Mazda Reference

MA93 MA014 Mazda ReferenceSubject: Fuel system pressure testing for fuel injected enginesSymptom: Hard starting cold, power loss climbing hills, overa

Seite 2 - Relieving Fuel Pressure

MA102Mazda ReferenceMA0149. Switch the ignition off, observe gauge reading after about 1 minute, pressure should drop no more than about 5 psi, then n

Seite 3

MA103Mazda ReferenceMA01411. Start the engine and check for leaks.2003–06 Mazda6 2.3L and 3.0L, 2006 Mazdaspeed6 2.3L TCz Procedure L1. Disconnect the

Seite 4 - RX-7 1987–88 Turbo Engines

MA104Mazda ReferenceMA014– PCM– Fuel pump– Pulsation damper– Fuel line dents, kinks, leaks or improper routingFuel Pressure variation specification (U

Seite 5 - 1995–97 B-Series Trucks

MA105Mazda ReferenceMA014Figure MA014-12 4. Remove fuel pump relay 46A, the relays are numbered on underside of fuse/relay box lid.5. With the ignitio

Seite 6 - 1998–2000 B-Series Trucks

MA106Mazda ReferenceMA0144. Disconnect the negative battery terminal.5. Disconnect the quick release fuel line connector in the engine compartment.6.

Seite 7 - 2001–2006 Tribute 2.0L

MA107Mazda ReferenceMA014Less than specified:• Fuel pump unit• Fuel line leakageHigher than specified:• Pressure regulator11. Turn the ignition switch

Seite 8 - 2001–2006 Tribute 3.0L

MA108Mazda ReferenceMA014Figure MA014-17 7. Connect the negative battery terminal.8. Use a fused jumper wire to ground the fuel pump check connector (

Seite 9 - 2001 B-Series Trucks

MA109Mazda ReferenceMA0142006 Mazda5z Procedure P1. Disconnect the negative (–) battery cable.2. Disconnect the quick release fuel line connector in t

Seite 10 - Mazda ReferenceMA014

MA110Mazda ReferenceMA014If fuel pressure exceeds specification, inspect the following:– Fuel pressure regulator9. Turn the ignition switch off and re

Seite 11

MA94Mazda ReferenceMA014Relieving Fuel PressurePressure must be relieved and a gauge connected before testing the fuel system. Wrap a rag around the c

Seite 12 - 2002–2006 B-2300 Trucks

MA95Mazda ReferenceMA014Yellow 2-Pin Fuel Pump Test Connector Locations• Refer to Figure MA014-1:• 1986–89 323—Left rear of engine compartment, near t

Seite 13 - 2004–06 Mazda3

MA96Mazda ReferenceMA014RX-7 1987–88 Turbo Enginesz Procedure B1. Switch the ignition off, then relieve fuel system pressure and disconnect the fuel s

Seite 14

MA97Mazda ReferenceMA0144. For vehicles with an external fuel pressure regulator only; disconnect the vacuum line at the pressure regulator. Use a han

Seite 15 - 2004–06 RX-8

MA98Mazda ReferenceMA0143. Remove fuel pump relay 7. Relays are numbered on underside of fuse/relay box lid.4. Switch the ignition off, then install a

Seite 16 - • 29 psi (200 kPa, 2.0 kgf/cm

MA99Mazda ReferenceMA0146. Switch the ignition on. Record fuel pressure on the gauge, it should be about 66 psi.7. Switch the ignition off, then remov

Seite 17 - 2006 Mazda5

MA100Mazda ReferenceMA0144. Install a fused jumper across terminals 30 and 87 (Figure MA014-8).5. Switch the ignition on and check for fuel leaks. Not

Seite 18 - Fuel Volume Test—All Models

MA101Mazda ReferenceMA0145. Switch the ignition off, remove the jumper wire and reinstall the fuel pump relay. Start and run the engine to allow fuel

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