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Rough idle?

Tiny
TORUMALEX7
  • MEMBER
  • 2007 DODGE CHARGER
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Hello, I bought the car in February, and I fixed a few things since I bought it. I’ve replaced both fuel pumps, fuel injectors, spark plugs, coils, MAP sensor, and rocker arms assemblies. I he run was running fine and then car will idle at 500 RPMs and surges a lot. I scanned it for pending codes and no codes popping up. I’m not sure what to check to see which parts have failed. I have attached a video of how the car acts and sounds when it dropped to 500 RPMs.
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Saturday, October 19th, 2024 AT 4:05 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

Oftentimes, a rough or erratic idle is the result of an engine vacuum leak. Have you checked to see if there are any leaks?

If not, start there. Here is a link that explains how to check and repair an engine vacuum leak.

Try this and let me know the results:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Take care,

Joe
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Saturday, October 19th, 2024 AT 8:52 PM

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