Q: My car won't start up after sitting for awhile unless I apply gas. I don't know if it is my fuel pump relay or my fuel filter.

asked by on February 23, 2017

My car won't start up after sitting for awhile unless I apply gas. I don't know if it is my fuel pump relay or my fuel filter.

My car has 184000 miles.
My car has an automatic transmission.

Sometimes the idle control valve will stick closed and with the throttle closed little to no air gets into the engine when trying to start the engine. You should have the throttle body and idle control valve cleaned to see if it fixes the problem. If not then replace the idle control valve and retest.

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

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

Jeep is having a hard time starting. 2004 Jeep Grand Cherokee

Hi there - your symptoms suggest a fuel supply issue, quite likely a fuel pressure check valve or fuel pressure regulator issue. Either of these can allow fuel pressure in the injection system to leak down while the vehicle sits....

My 2002 Ford Crown Victoria is acting like it want to go, even though I'm not pressing on the gas

Hello. The most common cause of the high engine idle accompanied with a delayed acceleration will be a vacuum leak in most cases. This engine gets vacuum leaks on the vacuum connection on the intake manifold for the PCV hose....

Car sputtering and dying when put into gear and given the gas.

This sounds like potentially a vacuum leak. I would check for any signs of vacuum leak first if you have access to a vacuum gauge set. If not, I would recommend having an expert from Your Mechanic come to your...

Related articles

Symptoms of a Bad or Failing Idler Pulley
Common signs include a damaged bearing or pulley, squealing from the engine area, and visibly worn pulleys.
How Does an Engine Idle High and Low?
A common problem that car owners experience is high or low engine idle. A damaged intake gasket, cold air intake, or PCV valve can cause idle issues.
The Best Used Cars to Buy That Can Be Towed Behind an RV
Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Then they tow their car behind it – sometimes this practice is called...