Misfires and code P0300

Tiny
PIRATEDUDE101
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
Car has a misfire and code p0300. Code reader shows evap leak detection.
Friday, May 29th, 2020 AT 7:22 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

The P0300 indicated a random misfire. Do you have the code for the EVAP leak? It would help me diagnose what could be the issue as well as better direct you.

I will tell you that if it is a "Small Leak, " the best thing to do is have the EVAP system smoke tested. Basically, smoke is introduced into the EVAP system at a low pressure. Where the leak is located, smoke will come out.

Let me know.

Joe
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Friday, May 29th, 2020 AT 8:50 AM

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