So if I reset my pcm truck runs like brand new for 2days (25 miles )

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Justmikeslogin

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Ram Year
2003
Engine
Hemi 5.7
My 2003 ram hemi has me stuck . I have replaced almost every sensor under hood , cleaned injectors ,installed a tuner , cleaned throttle body , u name it. Has significant power loss , takes a lot to get her moving and as soon as reaches lockup she falls on her face .. (Bogs) . I found that If I unplugged all connectors to pcm ... Wait ....wait .. Prob 20 min ,reconnect and drive she runs ,shifts ,pulls trailer like a 2016 .. This lasts for about a day (25) miles . I believe while relearning something goes wrong .. I'm lost!! Any help would be appreciated .. Hate to get rid of her but I pull a boat and enclosed trailer and need the full potential ..
 
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Justmikeslogin

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Hemi 5.7
Oh and tuner is uninstalled ,didn't make a diffrence.
 
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Justmikeslogin

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Yes completely stock , uninstalled gt tuner ,reset and runs superb for approx 1 day then can hear and feel powerloss
 

Statcher1

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Have you tried running it with the tuner to see if it makes a difference?


Sent from the Rocket in my Pocket
 
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Justmikeslogin

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Yes ,initially that's why I got the tuner but ,makes no change in running when installed
 

JAMMAN

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2002
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4.7
What codes is it throwing?
 

joepizuro

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Magnum v10
Try popping out your o2 and cleaning it
 
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Justmikeslogin

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I actually replaced them both a few days ago with no change , Did a compression check too all at around 150 . I'm sorta leaning towards the throttle body replacement ..
 

joepizuro

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Though no part makes sense if it works fine until the computer has time to learn....
 

Redtruck-VA

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Hemi-5.7, 5.9 12v & 24v diesel
Is this "limp mode" you are experiencing? Usually there is a DTC associated with a TB shut down.
 

speedk1ng

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Hemi 5.7
I actually replaced them both a few days ago with no change , Did a compression check too all at around 150 . I'm sorta leaning towards the throttle body replacement ..

Happen to get this figured out? I recently picked up a '04 Ram 2500 5.7L that's doing pretty much what you described.
 
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