Question about 1992 Mazda Protege

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Fuel pump does not run

Where is the fuel pump relay

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It should be under the hood in the fuse compartment

Posted on Nov 15, 2008

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1 Answer

Why the fuel pump don't run and the relay don't click when i turn the key on?


If you can't hear your fuel pump priming then either, the pump needs replacing or the relay. If you replace the relay and you still don't hear the pump prime then it's the fuel pump.

Oct 26, 2016 | Cars & Trucks

1 Answer

Why does the fuel pump relay don't click when i turn the key to run? and why there is no power at the fuel pump relay?


the operation of most fuel pumps is controlled by the fuel pressure regulator
when the fuel pump gets to set pressure , the pump is switched of by the ECM at the relay level
maybe nothing wrong with your system just the system working as designed
if you have pressure in the fuel manifold when you turn the ignition on then the pump will not run but will if there is a fuel leak somewhere and the pressure drops off

Oct 25, 2016 | Cars & Trucks

2 Answers

No power at fuel pump 99 geo metro 1.0 liter why


your problem Can be fuse /relay broken damaged corroded wire /connection

Jul 11, 2016 | Geo Metro Cars & Trucks

1 Answer

Fuel pump relay clicking. Fuel pump was changed 5 mouths ago.


Does vehicle start an run ? amp draw test the fuel pump , relay bad . Most vehicles the PCM controls the fuel pump relay . Just because relay is clicking does not mean fuel pump has a problem . Auto Repair How to Check Fuel Pump Relay Fuel Pump Electrical Circuits Description and Operation

Mar 16, 2016 | Cars & Trucks

1 Answer

How do i check the conuity on the fuel relay 97 cavalier


there is a fuel pump jumper pigtail with a green plastic cover that if you run a power wire to it and the pump keeps running then it could be a fuel pump relay as you have bypassed the relay by doing this. if it doesn`t run then the fuel pump is the problem and needs replacing.

Aug 24, 2014 | Cars & Trucks

1 Answer

Fuel pump relay fault Can't find relay. No power to fuel pump. Checked fuses. All good


Model? Year?

Check per owner manual to be sure inertia switch is not tripped. Remember, fuel pump only runs for 5 seconds when key is turned ON, then it shuts off if engine is not running. Pump always runs when key is in START position.
Listen for pump to run inside fuel tank for 5 seconds after key is ON.

The PCM power relay turns on the PCM and the PCM turns on the fuel pump relay, which turns on the fuel pump.

See owner manual forfuse & relay charts.

Apr 06, 2011 | Ford Expedition EL Cars & Trucks

2 Answers

I have a 98 jimmy.4dr, 4wd..problem --no power to fuel pump....if you stand on drivers side looking at fuse panel (the top right pin of the relay has power, but thats the only one...if i jump power to the...


Fuel Pump Electrical Circuit
OPERATION
When the key is turned ON with out the engine running, the control module turns a fuel pump relay ON for two seconds. This builds up fuel pressure quickly. If the engine is not started within two seconds, the control module shuts the fuel pump OFF and waits until the engine starts. As soon as the engine is cranked, the control module turns the relay ON and runs the fuel pump.
When the engine is cranking or running, the control module receives the Crankshaft Position (CKP) sensor reference pulses which in turn energize the fuel injectors. As a back-up system to the fuel pump relay, the fuel pump can also be turned ON by a fuel pump oil pressure switch. When the
engine reaches about 28 kPa (4 psi), and the fuel pump relay does not complete the circuit, the fuel pump oil pressure switch will close to complete the circuit to run the fuel pump.

An inoperative fuel pump relay can result in long cranking times, particularly if the engine is cold. The fuel pump oil pressure switch will turn ON the fuel pump as soon as oil pressure reaches about 28 kPa (4 psi).



You can test to see if the relay it's self is bad by swapping it temporarily with another relay. If your truck has AC then that one should be compatible. Just compare the two to see if they're the same and if so, try using the AC's relay.

Apr 05, 2011 | GMC Jimmy Cars & Trucks

2 Answers

Both fuel pump relays run hot. I have replaced both of them. The truck started and ran for about 30 minutes then quit. I replaced the relays and it ran for a few minutes and quit again.


You could have a bad fuel pump relay switch. The fuel pumpmag-glass_10x10.gif relay switch gets the fuel pump running in the vehicle during the start cycle. The terms fuel pump relay and fuel pump relay switch are used interchangeably. The fuel pump relay begins its job when the automobile operator turns to the ignition on, but before the motor is actually running. At that point, the fuel pump relay in some cars sends a signal to the ignition switch, which in turn sends a signal to the fuel pump to turn on. Others fuel pump relays have actual circuitry inside of them that receive the ignition signal and directly signal the fuel pump to engage.

Have a great day!

Sep 05, 2009 | Ford F-350 Cars & Trucks

1 Answer

No Power to Fuel pump


I would check the ground for the fuel pump relay that operates the switch side of the relay.
You should have 2 12v inputs to the relay. When the relay gets 12v input, it closes the relay switch on the heavy current side that sends 12v to the fuel pump.

A relay is needed because you don't want heavy current going through the switch.

Also, most cars only run the fuel pump for 2 seconds when the key is turned on because you don't want the fuel pump running without the car running. If you listen closely at the fuel tank, you should hear the pump run for 2 seconds when you turn the key to "ON"
When the key is turned to "START", the fuel pump should run continuously.
The engine computer tells the fuel pump to shut off if the engine rpms are zero.
So, I would check the switch side of the relay. Power amd ground.

Mar 01, 2009 | 1992 Jaguar XJ6

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