3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Intermittent Multiple Cylinder Misfire

Old May 19, 2022 | 06:02 PM
  #31  
Colbymason1's Avatar
Colbymason1
Thread Starter
|
Registered User
Joined: May 2022
Posts: 17
Likes: 0
Default

What are your thoughts on a bad cam sensor throwing off ignition timing and then the O2 sensor trying to lean it out for that reason
 
Reply
Old May 20, 2022 | 09:17 AM
  #32  
fj5gtx's Avatar
fj5gtx
Record Breaker
Joined: Sep 2007
Posts: 1,810
Likes: 105
From: PA
Default

Originally Posted by Colbymason1
I’ll have to give that a try. Maybe some bad wiring right there causing it to be intermittent… I have checked fuel pressure on the right rail and it was good but I don’t ever get a chance to when it is missing.
Probably multiple problems, just work one problem at a time. Upstream o2 sensor values play a big part on air/fuel mix. Switching o2 sensors side to side allows you to figure out if the sensor is bad or wiring/ecu malfunction. Get that solved and then lets have a look at the obd2 outputs again and see what the computer is doing with good front o2 readings...
 
Reply
Old May 20, 2022 | 09:46 AM
  #33  
fj5gtx's Avatar
fj5gtx
Record Breaker
Joined: Sep 2007
Posts: 1,810
Likes: 105
From: PA
Default

Originally Posted by Colbymason1
What are your thoughts on a bad cam sensor throwing off ignition timing and then the O2 sensor trying to lean it out for that reason
Lots of conditions can cause misfire, including a lean air/fuel mixture. Chase the obvious error first, then see what the computer logic does with good o2 sensor readings.
 
Reply
Old May 20, 2022 | 10:12 AM
  #34  
Colbymason1's Avatar
Colbymason1
Thread Starter
|
Registered User
Joined: May 2022
Posts: 17
Likes: 0
Default

Yeah I’ve got a sensor coming I’ll throw it on today and see how it works.
 
Reply
Old May 20, 2022 | 12:51 PM
  #35  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,398
Likes: 4,213
From: Clayton MI
Default

For the front O2 sensors, I like to replace both of them.....
 
Reply


Thread Tools
Search this Thread

All times are GMT -4. The time now is 06:26 AM.