Whenever I fill my car with gas, when I start my car the rpms start jumping and the car sometimes stalls. It's not from over filling because it happens even after adding only a few gallons.

  • 2
    Are you sure it's actually from adding gas and not from restarting after only being off for a couple minutes? Nov 21 '12 at 19:39
  • And what kind of car do you have? Make, model, year?
    – Nick
    Nov 25 '12 at 1:27

If anybody has done work with the evaporative emissions system or fuel tank, they could have swapped some hoses by mistake. Most likely though, just going off this one symptom and little else info, it sounds like a leaking purge valve (on the intake). If you can find it - it's typically a black plastic cone with a rubber house on each end, one vacuum to the intake itself and another back under the car towards the fuel tank, plus one connector, it would be simple to check. Once removed, it should hold vacuum (on there intake side) up to about 15 in mg. Also, you could pinch off the house with some clamps right before fill up and see if the problem is gone.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.