[Loki]

[Editor's Note: The stock fuel pump wiring consists mostly of 16-gauge wire that is routed through the engine control relay and a resistor. This wiring path to the pump may result in less than full alternator output voltage reaching the pump (especially during high-load, wide-open-throttle use) and consequently fuel pump flow may be less than optimal. The "hot wire" mod supplies full alternator/battery voltage to the pump using a relay, which is a heavy-duty switch that supplies high current, yet is switched by a substantially smaller current. The relay will have 4 or 5 connectors on it: one for a fused wired directly from the battery, one for a wire to ground, one for a wire from the low-voltage switch (the stock pump power wire from the harness in this case), one for a wire to the normally open device (the stock pump power wire on the pump electrical connector), and maybe one for a wire to the normally closed device (not used in this case). The fused wire directly from the battery to the relay should be 8 to 10 gauge or less to minimize resistance along the wire and maximize voltage supply to the pump. You can expect high-draw Denso fuel pumps, such as the "Supra" pump, to draw a little over 20 amps with a 14 volt supply at fuel line pressures greater than 70 psi (over 27 psi boost). So a 30-amp relay should be used. You can start with 20-amp fuses, and increase the fuses to 30-amp ones if necessary.] more

[Alex]

[maxidresses]

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[caveden]

[diven]

Is the vehicle definitely not getting fuel ? and there is definitely a hot feed to pump ..if yes .. check the ground(orange)wire near the top of radiator support or ground the pump(orange wire) to another ground point near the pump on the chassis somewhere .. or you could run a hot and ground direct from battery through a switch to the pump so you can check it is working correctly ?? making sure you remove the original hot and ground wires from pump ? let me know more

[audiogadgets]

The ground is on top of the radiator support which can become loose or broken.

[DerrickEaton]

Let us know what happens and please upload pictures or videos of the problem. more

[donaldmoreg]

Here is a fuel pump wiring diagrams and a guide to help you fix the problem.

[willyzg68]

The power wire goes directly to the pump, and the pump is grounded to the chassis. The relay ground was connected to the screw that was used to secure the relay itself to the body inside the trunk. We stripped the paint from the grounding point on the chassis and in the trunk to ensure that the ground is good. here

[ronaldmaustin]

This is the circuit breaker. Instead of a fuse, this system auto-resets when the fault goes away, so a blown fuse won’t leave you on the side of the road.

[dorothymedney]

Upgrading your vehicle’s fuel system is often a necessary step when increasing horsepower. This is usually done with a larger fuel pump, fuel lines, and better filtration than the factory components. If you are adding fuel injection to a carbureted vehicle or need more flow than a mechanical pump allows, then you need to an electric fuel pump. Most of fuel injection systems supply a signal feed for the pump to power on, but this is not suitable to actually power up the pump, rather it is a trigger for a relay system. If you are adding an electric pump to carbureted vehicle, you won’t have any power source at all. The fix for these issues is a fuel pump relay kit.

[manixrock]

The wires were fed through a grommet in the trunk floor. [links]

[cacba]

The entire fuel pump relay kit installation takes about 2-3 hours, depending on how much interior you have to remove. If you run the wires under the car, extra care must be taken to prevent the wires from being damaged. Heat and road debris can make for a really bad day when it comes to wiring, so be careful to secure dangling wires and protect them from heat and debris.

[hypertux]

If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. here

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[helen123]

Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. [links]

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