Why is my fuel pump relay getting hot?
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?
Where do you find the fuel pump relay?
When you shut off the ignition, it powers down the fuel pump. In most vehicles, the fuel pump relay can often be found in the fuse box in the engine bay, which is usually a long black box which contains fuel pump relay along with various other fuses and relays.
Is there no power to the fuel pump?
No power to the fuel pump and the fuel relay is not getti… Q: No power to the fuel pump and the fuel relay is not getting power. My car has 190000 miles.
Why does the fuel pump relay need to be cleaned?
Cleaning the fuel pump relay is a simple maintenance job you should learn, as the relay can get dirty easily in many circumstances. If it’s located inside the engine bay, which can get hot from the engine’s heat, the heat can impede the relay’s performance.
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?
When you shut off the ignition, it powers down the fuel pump. In most vehicles, the fuel pump relay can often be found in the fuse box in the engine bay, which is usually a long black box which contains fuel pump relay along with various other fuses and relays.
What should I do if my fuel pump gets hot?
Check the voltage at the pump connection while the pump is on and make sure you have at least 12 volts there. If that is ok then only thing I can think of is there must be another path that the current is taking. Did you measure the current at a point near the relay that included the total current paths from the relay?
Cleaning the fuel pump relay is a simple maintenance job you should learn, as the relay can get dirty easily in many circumstances. If it’s located inside the engine bay, which can get hot from the engine’s heat, the heat can impede the relay’s performance.
Check the voltage at the pump connection while the pump is on and make sure you have at least 12 volts there. If that is ok then only thing I can think of is there must be another path that the current is taking. Did you measure the current at a point near the relay that included the total current paths from the relay?
Why does my Cobra fuel pump get hot?
It sounds like a loose connection at the relay socket, or a loose socket. If you have a carburetor, there is way too much pressure. Some electric fuel pumps for carbs only put out 2.5 PSI. The Cobra is fuel injected. I have changed the power and ground wires to 10 ga. wires and I changed the relay to a weather pack heavy duty 70 amp.
What should I do if my fuel pump relay gets hot?
After looking at the specs for some of the pumps like you have it appears that the current draw you measured is about normal. If the relay is getting hot after some run time then I would suggest you get a relay with a higher current rating.
It sounds like a loose connection at the relay socket, or a loose socket. If you have a carburetor, there is way too much pressure. Some electric fuel pumps for carbs only put out 2.5 PSI. The Cobra is fuel injected. I have changed the power and ground wires to 10 ga. wires and I changed the relay to a weather pack heavy duty 70 amp.
What happens if a car relay gets too warm?
The relay is going to create some amount of heat. How much heat is really unknown. I believe relays will cut out if they get too warm, but I’m unsure of how much heat buildup would cause it to do such. Considering the price of a relay, I’d highly suggest just changing it out.
How much heat should a motor relay get?
But, the loads on the relay are fused at 10 A, 30 A, and 10 A (ECM and injection pump, PCV heat, and engine control solenoids and the MAF sensor). At 50 A with a contact resistance of even 0.01Ω the power dissipation would be 25 W. That seems like enough heat to be a problem and enough to make the relay feel quite hot.
