Engine only firing on two cylinders

Tiny
ANGELA GRESHAM
  • MEMBER
  • 2006 NISSAN SENTRA
  • 115,000 MILES
It's only firing on 2 cylinders. Replaced almost everything. Plugs, wires, battery, alternator, ECM.
Wednesday, June 16th, 2021 AT 4:18 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Did this happen all at once? Have you scanned for diagnostic trouble codes? Here is a quick video showing how that is done:

https://youtu.be/YV3TRZwer8k

If you have replaced everything, then we could have a fuel injector problem or engine compression issue. Here are two links that explain how to check both:

https://www.2carpros.com/articles/how-to-test-engine-compression

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

Also, let me know if you have checked fuel pressure and for a plugged catalytic converter.

Take care,

Joe
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Thursday, June 17th, 2021 AT 10:40 PM

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