Idling rough when in park and while sitting at stoplights

Tiny
06RANGER2
  • MEMBER
  • 2006 FORD RANGER
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 73,889 MILES
I’ve had this truck about 5 months and just within the last 3 months I’ve noticed the truck idling rough when in park and while sitting at stoplights/in traffic. Also when you rev the engine, it gets up to about 3,000 RPM’s and the truck just shakes. I’m thinking it’s either a vacuum leak or a bad sensor, maybe fuel injectors. Any help is appreciated.
Friday, March 26th, 2021 AT 8:09 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More then likely this is a vacuum leak. Here is a guide that will help find this leak:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, here is a video if that is a better help.:

https://youtu.be/4ktw1X4W_-k

If this checks out then we can move on but we will need to check for codes as well,

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If it is a sensor issue we should have some codes however this sounds like a vacuum leak so I suspect you will find something there. Let us know what you find. Thanks
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Saturday, March 27th, 2021 AT 7:00 PM

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