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2011 Dodge Ram P0300 ramdon miss fire

Tiny
WMW111
  • MEMBER
  • 2011 DODGE RAM
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 66,000 MILES
I have been having problems with miss fires. The happen randomly with no consistency with no other codes. I have replaced the spark plugs and my camshaft position sensor and have cleaned the injectors. After I replaced the spark plugs the miss fires stopped for about 200 miles then stated back up again.
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Monday, March 30th, 2015 AT 10:34 AM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Has the check engine light come on?
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Monday, March 30th, 2015 AT 7:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Sorry, I just realized that was in the title of your post. Have you checked for vacuum leaks? Have you checked fuel pump pressure? Are there any other codes that come up?
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Monday, March 30th, 2015 AT 7:39 PM
Tiny
WMW111
  • MEMBER
  • 3 POSTS
No other codes but I'm unable to check for pressure. I also did not see any leaks.
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Tuesday, March 31st, 2015 AT 8:52 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
How did you check for vacuum leaks? Also, you really should check fuel pressure.
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Tuesday, March 31st, 2015 AT 9:27 AM
Tiny
WMW111
  • MEMBER
  • 3 POSTS
I just fixed it. I found out that it was the o2 sensors were going bad.
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Wednesday, April 1st, 2015 AT 10:53 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Glad you found it.
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Wednesday, April 1st, 2015 AT 9:18 PM

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