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What relay is for the fuel pump?
It is often found in the fuse box located in the engine bay and functions as the primary electronic switch that controls power to the fuel pump. The fuel pump relay is usually controlled by the ignition or powertrain control module, and when switched on, will provide current to the fuel pump so that it may function.
Do you need a relay for a fuel pump?
It depends on how long the wire run is, how thick the wire is, how much current the pump draws, and what other types of controls you want on the pump circuit. Low current pump, short heavy wire, no funky control requirements means you can go without a relay.
How many amps is a fuel pump relay?
A TBI pump may have a normal current draw as low as 3 to 5 amps, with PFI pumps pulling 4 to 6 amps on average. A GM central point injection (CPI) pump (55 to 64 psi) needs 8 to 10 amps.
How do I know which fuse is for the fuel pump?
Remove the cover with a small screwdriver and pull the lid off of the fuse panel. On the inside of the lid there should be a label that identifies the fuse arrangement, similar to the label on the power center under the hood. Look for the same lettering that designates the fuel pump fuse.
How do I know if its the fuel pump or relay?
How to tell if fuel pump relay is bad (6 Signs)
- Check Engine Light (CEL) Illuminated. In most cases, the primary symptom is a check engine light.
- High Mileage.
- Long Starting Time.
- Engine Performance Issues – Stalling, Idling, Acceleration, Not Starting.
- Car dies while driving.
- Silent Fuel Pump Noise.
How do you check if a fuel pump relay is bad?
How to tell if fuel pump relay is bad (6 Signs)
- Check Engine Light (CEL) Illuminated.
- High Mileage.
- Long Starting Time.
- Engine Performance Issues – Stalling, Idling, Acceleration, Not Starting.
- Car dies while driving.
- Silent Fuel Pump Noise.
- Park the car in safe and level ground.
Is EFI relay Same as fuel pump relay?
Up through 77 the EFI relay was actually two relays combined in the same container and one of them controlled the fuel pump (and was referred to as the fuel pump relay in some of the documentation).
Why would a fuel pump not get power?
If you there is no power to the fuel pump or the relay, then there may be a possible electrical issue with the vehicle. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
What size fuse does a fuel pump use?
Holly instructions say to use a minimum of 14 AWG (2.08mm²) and a 7.5amp fuse, so 2mm² should be OK as it’s rated for around 17.5amps. I’d wire it up through a relay with an inertia cutout switch in the circuit so the fuel pump shuts down in the event of an accident.
What would make a fuel pump not turn on?
If the fuel pump is not coming on, and the fuse and relay are good, then it may be possible that there is a problem with the pump or the fuel pump circuit. The first thing I would do is check to make sure that there is power to the fuel pump circuit, and that the relay is in fact sending power to the pump.