Check engine light on misfires

2001 HONDA CRV
100,000 MILES • 2.0L • 4 CYL • AWD • AUTOMATIC
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BILL E
  • MEMBER
  • 1 POST
trouble codes p0302 p0303 p0304 p0300 p1456 p1399 gas recently replaced spark plugs look okay mil flashes very rough idle exhaust pipe and muffler replaced less than 1 month ago problem started 2 days ago was running fine previously
Mar 28, 2015 at 8:06 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,512 POSTS
Hello,

All these codes have to do with engine misfiring it sounds like you have a blown head gasket between two cylinders but to be sure lets do a compression test to confirm the issue.

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

and this guide can help as well

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

Feb 22, 2018 at 6:19 AM
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