Why would a fuel pump draw too many amps?
Why would a fuel pump draw too many amps?
Poor contact between the brushes and one or more of the commutator segments will produce jagged or low-amplitude humps. Mechanical resistance inside the pump can result in higher-than-normal average pump current. A clogged fuel filter or fuel line restriction will also increase pump current.
How many amps does a fuel pump relay draw?
On most vehicles, a new fuel pump draws about three to five amperes of current.
How to test and replace a fuel pump relay?
How to test and replace a fuel pump relay. The principles shown here apply to most vehicles. However, it’s best to check with your vehicle’s repair manual for testing parameters.This specific vehicle is a ’97 Nissan Maxima. — Choosing the best oil filter: Wix XP / Amsoil / Royal Purple..
Why is my fuel pump relay getting hot?
The strange part is it seems to get hot when I am driving the car on the road. All grounds and hot wires have been tested for resistance while the car is not running. Additionally, the 9.2 amps and the 12+ volts were verified when I had the car on a dyno three weeks ago. Anything else I need to check?
What to do if your fuel pump is not working?
Check out your vehicle’s service manual to find out where to check and the proper procedure for checking it. Test for source voltage, to determine whether or not the good charge that’s leaving the fuse is getting to the pump. If no power is making it to the fuel pump, then check the fuel pump relay circuit.
What kind of fuel pump is in my car?
The fuel pump is a MagnaFuel in-line pump. It has 12+ volts to the pump and is pulling 9.2 Amps when I force the pump to run constantly via the on-baord engine management system (computer). The relay and wires get slightly warm when I do this for about 15-20 minutes with the car is in my garage.
How much does it cost to replace a fuel pump relay?
You can easily find fuel pump relays online or at any automotive spare parts shop.The average replacement cost of the fuel pump relay ranges from $90 to $150, of which $20-$50 is for parts and the remaining is the labour cost.
What to do if your fuel pump relay stops working?
Connect one lead to one of the power circuit pins, and connect the other lead to the other power terminal. If you hear a beeping sound, your fuel pump relay’s power pins have shorted. Replace the relay. You can test the fuel pump relay, along with many other parts in your car, with the cheap and handy multimeter. (Photo Source: carcody)
How many pins does a fuel pump relay have?
The fuel pump relay does often have 4 pins, and in this case, it is often easy. If your relay has more pins and not the same numbers mentioned here, you need to check a wiring diagram. Lift it and check under it for the numbers 30, 85, 86, and 87. If you locate these numbers, you can put the fuel pump relay back.
Where is the fuel pump fuse box located?
The engine’s or the dashboard fuse box is usually a long black box containing a fuel pump relay and various other fuses and relays. For different vehicles, the fuel pump relays can be located in different places.
