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    Engine idles roughish

    This is a discussion on Engine idles roughish within the Dodge Dart 2.4L Tigershark forums, part of the Dodge Dart Garage - The Mopar Zone category; What was the issue and how did you fix it? Thanks in advance!...

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    1. #11
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      What was the issue and how did you fix it? Thanks in advance!

    2. #12
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      I changed the spark plugs out around 45,500 miles on my new to me 2014 2.4L GT. The new plugs fixed 90% of the rough idle, right up until it started getting cold in the last few days here. Originally the A/C was noticeable when running until I changed the plugs. Now the heater seems to do the same thing the A/C did before the change in plugs. It is still probably 50% better than it was when I first got the car about a month ago though.

      Not sure this will help everyone out there or not, but it was a significant improvement for me at least.

      BTW, I got cheap plugs, nothing extravagant. I picked up Autolite Eriduim XP 5325 at Autozone for around $35.

      Here is a picture of the old one I pulled and the new one I was replacing it with. I have no idea if they were the original plugs from the factory or not either.

      Sent from my SM-N950U using Tapatalk

    3. #13
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      TSB PCM update? I am having very similar vibration with AC especially when idle. What is this update?

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    5. #14
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      My 2015 GT has 75000 miles on it and rattles like crazy at idle.
      I changed the plugs this past summer with iridium units but that didn't help

      Also, last summer had an issue with the ac not blowing cold at idle or low rpm.
      Took to the dealer only to be told "No Problem Found".
      Now I think its an air door issue as when you change the heat direction from floor to dash vents there is little change in flow.

      I have extended warranty so one day its back to the dealer....

    6. #15
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      If you have significant vibrations in idle and with A/C on, the first thing you should check is your motor mounts.

    7. #16
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      Yeah, but should I replace with OEM, stock replacement or aftermarket poly?
      I drive it everyday as my work vehicle but always want the best if i'm going to replace something.

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      Quote Originally Posted by Lyonsperf View Post
      Yeah, but should I replace with OEM, stock replacement or aftermarket poly?
      I drive it everyday as my work vehicle but always want the best if i'm going to replace something.
      Aftermarket poly. The OEMs will need to be replaced more than once if you keep the vehicle for it's entire life.

      https://www.deyemeracing.com

      Select "Products", then year, then Dodge Dart, then scroll down to the "Engine/Tranmission" section and you will see the mounts.

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      I too think its the motor mounts. had the lower center one replaced and it seemed to help a tiny tiny bit, but I need to check the upper mounts next.

    10. #19
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      There is a recall for an update available for Dodge Dart.

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      Did anyone know the gauging for the spark plugs I have mines at .47 but I still have a little lag.. i tried 50 and well that was no help at all.

     

     
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