Q: Replaced fuel pressure regulator and fuel pump,still no power going to fuel pump

asked by on

No power going to fuel pump,new fuel pressure regulator and fuel pump

My car has 70000 miles.
My car has an automatic transmission.

This sounds like you may not have any power going to the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your ECU actually connects one of the ground wires to complete the circuit and send power to the fuel pump. If the wires all have power running through them, then it is likely you have a faulty relay. The wire coming from the fuel pump is the other ground wire. I would recommend having an expert from YourMechanic come to your location to diagnose your wiring as this can be very difficult and time consuming without the proper wiring diagram.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Replaced fuel pressure regulator and fuel pump,still no power going to fuel pump

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 2005 saturn relay does it have a fuel filter

Start by checking for spark and fuel. If all fuses are good, possible causes can be a bad fuel pump if no fuel pressure is found at the injector rail. Also, it could be a bad ignition coil or bad...

Q: Shuts off and won't start for about an hour or so

Hi there. From the description you have provided concerning your vehicle's drivability problem, it hard to discern whether it does not turn over, or it does not start for about an hour after driving. If your vehicle will not turnover...

Q: Q: Gas leaking

Hi there. Considering the age of the vehicle, it may be equipped with a metal gas tank. Have an experienced technician inspect the vehicle for leaks and replace any components that show rust or corrosion.

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.