I changed my spark plugs and ignition coils a few days ago and I’m sure I did everything correctly , but after I put everything back together and started the car the rpm was up around 4000 . Idk if I touched the throttle body cable or something because it is slightly opened and I can’t figure out how to readjust the cables , I’ve watched videos but they don’t look exactly like my cables . I have an 08 mercury mariner

  • Hello. Please tell us which vehicle and engine you have.
    – HandyHowie
    Mar 14, 2023 at 19:40
  • And which engine is it? Mar 14, 2023 at 21:13
  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Mar 14, 2023 at 21:57
  • 3.0 L V6 , 08 mercury mariner Mar 15, 2023 at 5:20
  • I’m trying to figure out why my rpm is so high at idle when I start my car , idk if I accidentally touched the throttle cables when I was changing my spark plugs . Mar 15, 2023 at 5:21

1 Answer 1


I'm not familiar with this car, but perhaps check the Idle Air Control Valve and the vacuum lines and wiring around it. You may have bumped a wire or hose lose or there may be a split in a vacuum line.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .