Q: Need to cycle fuel pump on and off two or three times before starting. Fuel pump or pressure regulator?

asked by on

Suddenly hard to start. When not driven for 24 hours starter keeps chugging until I switch off ignition and try again, then it starts. Or, if I turn key on five secs, turn off and repeat, so I cycle fuel pump, before starting, it starts right away. Is this fuel pump or fuel pressure regulator? (Battery is fine, 12.6 volt unloaded 12.2 loaded. I guess at 30k miles spark plugs are fine.)

My car has 30000 miles.
My car has an automatic transmission.

Hi Peter. Thanks for contacting us tonight. What you are describing is common with a faulty fuel pump relay or pressure regulator - as opposed to the fuel pump itself. If you’re able to ’cycle the pump’ that typically indicates that the relay is not supplying power to the pump consistently - or the pressure regulator is starting to show signs of wearing out. It is also possible that the fuel filter is clogged with debris. I would start by checking the fuel pump relay to ensure it’s not loose, corroded with debris or damaged, followed by the fuel regulator and finally, double check the fuel pump ground wire connection - as this can also be a source of this problem.

Was this answer helpful?
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. Need to cycle fuel pump on and off two or three times before starting. Fuel pump or pressure regulator?

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: How much horsepower does my car have, and what is the correct tire pressure?

Hi there. According to the factory, your 2009 Jeep Wrangler with the 3.8L V-6 engine has 202 horsepower. The recommended tire pressure for your vehicle, assuming it's a Rubicon edition, would be 37 lbs of pressure on all four tires....

Q: My 2000 Jeep Grand Cherokee was driving okay but now when I go to press the gas pedal it does not accelerate

What you are describing sounds like you may have a clogged or damaged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When the catalytic converter is...

Q: Convertible top not going up or down

You are likely low on hydraulic fluid for your convertible top. A hydraulic system is used to move the convertible up and down. It is possible that there are leaks within the system. Even after repairing leaks, a factory scan...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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.