What does a constant pressure fuel pump do?
This fuel pump is a constant pressure fuel pump that can operate on two different voltages, high and low. What this means is that the Powertrain Control Module (PCM) can send low voltage to the pump for idle-like conditions when less fuel is required, and high voltage for high-flow conditions such as wide open throttle.
What does it mean when your fuel pump is not working?
Fuel pump inertia switch. And so, there’s no need to spend time testing them or money replacing them. CASE 2: Fuel pressure is not present. This usually means that the pump has failed, but not always. I would recommend testing/checking the following before condemning the fuel pump:
How does the PCM work on a fuel pump?
The PCM energizes this solenoid, which lifts the spill valve off its seat and allows fuel to enter into the fuel pump chamber. When the PCM de-energizes the spill valve, the pintle is forced short with the assistance of a return spring.
What does no fuel pressure on fuel rail mean?
No fuel pressure on fuel rail after pump and filter change on my 96 grand prix GTP 3.4L I have only $11.90 in my acct. – Answered by a verified Pontiac Mechanic We use cookies to give you the best possible experience on our website.
This fuel pump is a constant pressure fuel pump that can operate on two different voltages, high and low. What this means is that the Powertrain Control Module (PCM) can send low voltage to the pump for idle-like conditions when less fuel is required, and high voltage for high-flow conditions such as wide open throttle.
What to do if your fuel pump runs but no fuel pressure?
Its no big deal, just pull the pin out the back side of the harness, straighten out the barbs on the pin and flair them out a little and push the wire back through gently till it seats again… That is if you have in fact damaged some wiring at the harnesses.
The PCM energizes this solenoid, which lifts the spill valve off its seat and allows fuel to enter into the fuel pump chamber. When the PCM de-energizes the spill valve, the pintle is forced short with the assistance of a return spring.
No fuel pressure on fuel rail after pump and filter change on my 96 grand prix GTP 3.4L I have only $11.90 in my acct. – Answered by a verified Pontiac Mechanic We use cookies to give you the best possible experience on our website.