The engine runs rough, loss of power and sputters

2001 NISSAN FRONTIER
200,000 MILES • 3.2L • 6 CYL • 2WD • AUTOMATIC
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KEITHM1978
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  • 1 POST
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.
May 16, 2022 at 10:33 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
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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May 17, 2022 at 7:34 AM
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