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2005 5.3 Chevy miss fire 1,4,7, & 8
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allen1205
New User
Aug 22, 2013, 12:47 PM
Post #1 of 7
(1706 views)
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2005 5.3 Chevy miss fire 1,4,7, & 8
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I have a 2005 Chevy 4x4 with the 5.3, it is idling really harsh and is showing miss fire on cylinders 1 4 7 8. I have changed 02 sensors. any help would be gratefully appreciated It is showing code p0300 and also the code for evap solenoid
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 22, 2013, 1:05 PM
Post #2 of 7
(1696 views)
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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What else has been done?
How did this start?
What is the fuel pressure?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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allen1205
New User
Aug 22, 2013, 1:15 PM
Post #3 of 7
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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I started just the other day. I was going down the road and it just lost almost all its power. I have changed the first o2 sensor on the drivers side a month ago. that fixed the problem that was going on at the time. The fuel pressure is 60psi at the port on the fuel rail.
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allen1205
New User
Aug 22, 2013, 1:16 PM
Post #4 of 7
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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I have had the convertors check and was told they are good.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 22, 2013, 1:21 PM
Post #5 of 7
(1680 views)
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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Did you verify that fuel pressure reading during the time it was running bad?
No other codes? Have you checked recently?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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allen1205
New User
Aug 22, 2013, 1:23 PM
Post #6 of 7
(1678 views)
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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yes it was checked while it was running. it would idle a little better with the bleeder on the gauge pressed. the codes where checked this morning.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 22, 2013, 1:42 PM
Post #7 of 7
(1668 views)
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Re: 2005 5.3 Chevy miss fire 1,4,7, & 8
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Someone is going to have to analyze the sensor data in the computer to look for something out of place.
If you can snapshot all the data and post it here, that might help.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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