Question 1

How to check the fuel pump operation and fuel pressure on Mazda MX-5 Miata?

Accepted Answer

In 1997 and earlier models, the operation of the fuel pump can be checked by connecting the diagnostic connector terminals of F/P and GND with a jumper wire, removing the fuel filler cap and turning the ignition switch to ON without necessarily turning on the engine to listen to the sounds of the pump. In case the pump is not starting, trace the voltage on the fuel pump connector and verify the EFI fuse and relays as needed. In the case of fuel pressure, release system pressure, de-connect negative battery cable and attach fuel pressure gauge to a T-fitting placed on the fuel feed line. Start the engine and compare the fuel pressure indications, and in any case, check restricted areas and faulty parts. In 1999 model, 2005 models, and others, utilize a fuel pressure gauge, which can read 65 psi or higher and release the fuel pressure and disconnect the negative battery terminal. Install the gauge between the No. 1 fuel pulsation damper and the fuel rail and measure the fuel pressure at idle and see whether the hold pressure or not after switching off the engine. In 2006 and later models, repeat the steps, but with the correct gauge and fittings, making sure to short the terminals of the fuel pump check connector to ground to test. Check fuel pressure, priming pump and leak or faulty parts (where necessary). Never leave the battery unattached and never leave the tests without checking the battery after the tests.

Question 2

How to remove and install the fuel pump and fuel sending unit on Mazda MX-5 Miata?

Accepted Answer

On older models (before 2005) the first step is to dismount a fuel tank cap and depressurize the fuel system. Unplug the cable of the negative pole of the battery, and pull out the package shelf trim behind the seats and fuel pump access cover. Disconnect the electrical connector attached on the top of the fuel pump, remove the fuel supply and return hose and remove the fuel pump retaining screws. Using great care, remove the fuel pump assembly, disconnect the electrical connector and position the hose clamp out of the pump fitting. Unscrew band that holds the pump to the bracket and unscrew the bracket with the rubber mount and unscrew the fuel pump. Check the sock filter and change it in case of contamination. To install, undo the process of removing, make sure to install a new set of O-rings and tank seal and then fit the pump firmly against the pad of the bracket. In models 2006 and beyond, turn off the fuel pressure and remove the negative battery terminal. Take out the center console, quarter trim, scuff plate, tire house trim, aero board, front seat back bar garnish, and back trim. Dislocate the electrical connector and the quick-release fitting of the fuel pump, the cover, and the fasteners of the fuel pump service hole cover. Unscrew the screws of the fuel pump retainer plate and the retainer plate together with its gasket and then remove the fuel pump out of the tank. It should be noted that none of the components of the fuel tank can be serviced independently; it is recommended to replace the entire pump in case one of the parts is faulty. Removal is inversely followed by installation.

Genuine Mazda MX-5 Miata Fuel Pump

8 Fuel Pumps found

Mazda MX-5 Miata Pump Part Number: LFG1-13-350

Mazda MX-5 Miata Fuel Pump Part Number: PE03-13-350

Mazda MX-5 Miata Fuel Pump Part Number: P59D-13-35ZA

Mazda MX-5 Miata Fuel Pump Part Number: LFG1-13-35XA

Mazda MX-5 Miata Fuel Pump Part Number: P59W-13-35XA

Mazda MX-5 Miata Fuel Pump Part Number: LFG1-13-35ZA

Mazda MX-5 Miata Fuel Pump Part Number: P51B-20-3F0A

Mazda MX-5 Miata Fuel Pump Part Number: PE31-20-3F0

Mazda MX-5 Miata Fuel Pump

Mazda MX-5 Miata Fuel Pump Parts and Q&A

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