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The engine runs rough, loss of power and sputters

Tiny
KEITHM1978
  • MEMBER
  • 2001 NISSAN FRONTIER
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Roughs rough. Popping noise. Spits and sputters, weak going. Shakes when idles like it not getting fuel or air like can't breathe so to speak. Shuts off when taking off.
Monday, May 16th, 2022 AT 10:33 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Based on all this info, I suspect we have a vacuum leak. However, we need to check all the basics and find out what is going on.

Let's start with checking for a leak and then fuel pressure. Then we can move onto greater things.

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

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

Once we rule these out then we need to check for internal vacuum issues by putting a gauge on the engine and see if the needle is steady or it bounces around.

I am attaching a chart below that will help with this but let's start with this info and see what direction we need to go.

Thanks
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Tuesday, May 17th, 2022 AT 7:34 AM

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