Rough idle, runs rough and no power

Tiny
AARON DEAN
  • MEMBER
  • 1998 MERCURY MOUNTAINEER
  • 5.0L
  • V8
  • 4WD
  • 180,000 MILES
Has a rough idle when I give it gas it bogs out. When I give it gas has little to no power more noise than power sounds bad runs badly.
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Friday, May 22nd, 2020 AT 8:41 PM

1 Reply

Tiny
KASEKENNY1
  • EXPERT
This sounds like a fuel issue. Let's start with checking the fuel pressure. Here is a guide that will help with that:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Another possible cause is a vacuum leak so here is a video that will show how to check for this:

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

Lastly we need to check injector operation if the previous two items check out.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

https://www.2carpros.com/articles/symptoms-of-low-engine-power

Let us know what you find and we can go from there. Thanks
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Saturday, May 23rd, 2020 AT 8:05 AM

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