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Thread: 2012 durango 5,7 engine stalls while driving no lights or code set

  1. #11
    Grasshopper
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    I having the same issue, each stall happened while I was slowing down to take a turn. As soon as I let off the brake, she would stall. Any chance you found a fix? TIA

  2. #12
    Super Moderator tomk's Avatar
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    My shots would be
    1: dirty throttle body - there is no separate IAC on the 5.7, and if the bore or throttle valve are dirty it may not be able to hold idle.
    2: bad battery - unstable line voltage has been causing idle stalls on Mopars forever, it seems..
    What?
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  3. #13
    JCC
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    My best guess is fuel pump was the root cause for all these issues, but since the fuel pump still works even though it causes the fuel relay to trip it was more cost effective for Dodge to bypass the internal relay with $20 in parts vs the $300 in parts and 4-6 hours of labor to replace the fuel pump. The easiest solution here is to replace the fuel relay as a brand new relay tends to be less prone to cutting off the fuel pump. Keep a spare in your glove box and when new one starts tripping swap them out again. Best solution would be replace the fuel pump, but may not fix is and pricey. Appears the fuel pump has been updated several times, and I believe the current version of the pump does not have the same voltage/amperage swings that kicks off the relay have no proof of this though. Would be great if Dodge owned up to this and replaced the fuel pumps instead of trying to get by with a $20 rig job. I imagine someone with a good grasp on the wiring could replace the relay with a fuse (or place on inline with relay) rated to fail at the same point as the relay trips and could confirm by the fuse blowing that fuel pump was creating a spike. Would just suck that vehicle would not restart till fuse was replaced, but would prove the relays themselves were not the problem.

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  5. #14
    Durango Guru Skippy426's Avatar
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    Quote Originally Posted by JCC View Post
    My best guess is fuel pump was the root cause for all these issues, but since the fuel pump still works even though it causes the fuel relay to trip it was more cost effective for Dodge to bypass the internal relay with $20 in parts vs the $300 in parts and 4-6 hours of labor to replace the fuel pump. The easiest solution here is to replace the fuel relay as a brand new relay tends to be less prone to cutting off the fuel pump. Keep a spare in your glove box and when new one starts tripping swap them out again. Best solution would be replace the fuel pump, but may not fix is and pricey. Appears the fuel pump has been updated several times, and I believe the current version of the pump does not have the same voltage/amperage swings that kicks off the relay have no proof of this though. Would be great if Dodge owned up to this and replaced the fuel pumps instead of trying to get by with a $20 rig job. I imagine someone with a good grasp on the wiring could replace the relay with a fuse (or place on inline with relay) rated to fail at the same point as the relay trips and could confirm by the fuse blowing that fuel pump was creating a spike. Would just suck that vehicle would not restart till fuse was replaced, but would prove the relays themselves were not the problem.
    Wish I would of known about this... Got the bypass done and roughly a year later the fuel pump totally died.

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