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Charger R/T misfire 1-4-6-7 and heavy jerking during acceleration

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  #11  
Old 01-19-2019, 05:42 PM
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Originally Posted by HeyYou
Anything is possible, but, I rather doubt it. Cylinders are distributed across both banks..... so a bad cat, would only affect two cylinders.
I agree and that's what pisses me off!
 
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Old 01-19-2019, 06:39 PM
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Or maybe it could be related, the cat not working properly it would trigger the o2 sensor and so preventing the engine to switch to 8cyl...
 
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Old 01-19-2019, 08:54 PM
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Originally Posted by Simon Strauss
Or maybe it could be related, the cat not working properly it would trigger the o2 sensor and so preventing the engine to switch to 8cyl...
More likely the other way around, if you have a mixture issue, the PCM should disable MDS while the condition is present.
 
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Old 01-19-2019, 10:11 PM
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Originally Posted by HeyYou
More likely the other way around, if you have a mixture issue, the PCM should disable MDS while the condition is present.
A mixture issue? Do you have any ideas in mind?
 
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Old 01-20-2019, 09:20 AM
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Which O2 sensor code are you getting? If it is just whining about catalyst efficiency, that should affect running much at all. If it is the front O2 sensor, that has a more profound affect on how the engine runs. A relatively easy test is to simply unplug them (both front O2 sensors) and see if the engine runs any better. If it does, replace the sensors. (Denso, or NTK please, seems dodge has real issues with Bosch sensors.)
 



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