ON SOME CHEVY VEHICLES THE OIL PRESSURE SWITCH HAS A DOUBLE RELAY BUILT INTO IT THAT IF IT IS BAD WILL ALSO FEED THE FUEL PUMP EVEN WITH THE IGNITION OFF
As well if the inertia switch was tripped that will also stop power to the fuel pump.
Would this cause the HVAC #21 fuse in the inside of truck to keep blowing?
Starts and stops the fuel pump depending on fuel pressure.
Starts and stops the fuel pump at the correct time.
The fuel pump relay, is controlled by the EEC module, which provides power to fuel pump under various operating conditions. When ignition is in "OFF" position, EEC power and fuel pump relay contacts are open. After engine starts, power to fuel pump is supplied through fuel pump relay. EEC module senses engine speed and shuts off fuel pump relay when engine stops.
Starts and stops the fuel pump.
Blown fuel pump fuse, defective fuel pump relay, bad fuel pump, or clogged fuel filter.
yes,because engine will stop if engine will stop ,power steering pump will stop. Yes, the power steering pump is powered by the rotation of the motor which is powered by fuel. If the motor stops the pump stops and steering becomes very labored especially at lower speeds.
that can be because of the fuel pump relay,a severed wire to the fuel pump or the fuel pump fuse is blown.
what is the cause of no power at the fuel pump
No. When a fuse blows it stops power from getting to the attached devices. It would power off and stay off. IF the fuel pump was attached to a self-resetting circuit breaker, then the power might cycle on and off.
The car stops running.
It routs power to the fuel pump. After it is gotten it's coil power from the computer.
If you're getting power to the pump this proves the fuel pump fuse and fuel pump relay are good. That leaves only two possibilities. Either the pump is running but it's not pumping fuel. Or possibly the fuel filter is clogged.
When the old one becomes noisy, weak, or stops pumping fuel altogether. Assuming the fuel filter is not clogged, the fuel pump fuse is not blown, and the fuel pump relay is good.
probably when the pump stops working! WOW
fuel pump relay
Blown fuse or defective fuel pump relay.
Check the fuel pump fuse and the fuel pump relay.
no, but there is a relay or fuse for the fuel pump you can pull. there really is no way to "reset" a fuel pump. if it stops working it needs to be replaced, assuming the pump is the cause of the failure
The arm of a mechanical fuel pump follows a cam and wherever the engine stops, that's where the fuel pump stops. The mechanical fuel pump is nothing more than a diaphragm with a couple "check valves" to force the fuel to only go in one direction. The diaphragm is spring loaded providing an effective pressure limitation.
If the relay is not supplying power to the fuel pump, then no fuel to the motor. No fuel - no power.
The fuel pump may stop working when you hit the ignition due to the mechanical failure.
Check the fuel pump relay and fuse.
A number of things come to mind:no gas in the tankclogged fuel filter (stops fuel flow completely)blown fuse for fuel pumpfuel pump diedIts broke. replace it.
Supplies power to the fuel pump.
Chevy never had a fuel reset button on any of there trucks. Check fuel pump for power at the fuel tank/fuel sending unit. If you have power there then replace pump. If you have no power at the fuel sending unit then CHECK the fuel pump fuse and relay.