What does a fuel pump control module do?
The Fuel Pump Driver Module controls the voltage delivered to a vehicle’s fuel pump. By controlling the voltage, the module maintains optimal fuel pressure and fuel delivery to the engine throughout its full operating range.
Does the fuel pump control module?
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.
What are the signs of a bad PCM?
7 Common PCM Failure Symptoms
- Your ‘Check Engine’ Light is On.
- Your Car Won’t Start or Starts Roughly.
- Sudden Loss of Gas Mileage.
- You Failed Your Emissions Test.
- Your Engine Stutters or Stalls.
- Erratic or Random Shifting.
- You’re Receiving a PCM-Related Error Code.
- What to Do If You Experience PCM Failure Symptoms.
What happens when you plug in the fuel pump control module?
It dropped to zero from 1.5, so the control module was apparently doing something. So I thought hell, what happens if I plug it back in to the fuel pump. So I plugged the harness back into the fuel pump and spun the starter, fuel spraying out strong. So it evidently fixed itself?
How does a PWM returnless fuel system work?
With the combination of PWM and fuel pressure feedback, a large-volume pump that normally would produce excessive heat during low fuel demand can be slowed down. In effect, the PWM system gives a large pump a dual personality: Slow it down for cruise and minimize heat generation, then speed it up for high fuel demand.
What does ground side of fuel pump mean?
EDIT: Now that I’ve been thinking about this more, since the ground side of the pump goes to zero when the pump is supposed to come on, that should indicate the module is closing the circuit to ground.
How many Watts Does a PWM fuel pump need?
Another feature of PWM control is the reduction in the electrical requirement. For example, the 5th-generation pump requires 120 watts to run at full speed at 58psi. At cruise, the PWM systems requires approximately 40 – 60 watts depending on if the system has a manifold referenced or static fuel pressure.