Q: Engine starts but won't idle

asked by on

Looking to buy this Astros Van. It has been sitting unused for a year or more. Put in a new battery and it starts as long as you have peddle to the metal. Then the RPM's start to catch up to peddle to the metal so you can gradually let off but have to be very careful. If you take your foot off the gas, it dies. It will not idle. But the engine is running great, fluids are great and the A/C works. Just the gas peddle isn't doing something right. In the old days, it would of just been a carburetor adjustment. With these cars I have know idea. Am I looking at something big or small to fix this. Thanks for your help

My car has 36000 miles.
My car has an automatic transmission.

The problem is most likely the fuel injection spider and fuel pump that needs to be replaced. The spider is inside the intake upper manifold and would cost over $1000 to get replaced. The fuel pump would be around $300 to $400. The fuel injection unit requires a high pressure from the fuel pump and the injectors are actually injector poppets that open the fuel to each poppet and the fuel pressure will push open the poppet and spray in the fuel. If the system is leaking fuel into the intake, then the regulator is leaking. This is why it runs at wide open throttle and not at idle. Have a certified mechanic inspect your idling issue, if you would like to have professional take a look at this in person.

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. Engine starts but won't idle

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: My car wont go above 40 mph,has a burning smell,and has a noise?

Hi There, What you are describing sounds like you may have a clogged 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: Why would transmission fluid shoot out of trans into the bell housing? is there a gasket or seal there had trans looked at and 👌

Hi there. There are multiple seals and gaskets inside an automatic transmission and along the inner case where the torque converter is installed that can leak into the bell housing if they are damaged. Small cracks or misalignment of the...

Q: There's no power going to main fuse box on 2015 silverado 1500 lt

Hello, thank you for writing in. The first step is checking the charging system for any obvious issues. Double check the battery cables are clean, dry, and tight. Make sure the new battery is fully charged. Then make sure the...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...