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Only firing on one side of the engine

Tiny
SISSY RAY SAUCIER
  • MEMBER
  • 2001 DODGE DURANGO
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
Changed coils today because it was running really rough no change after I did. Had a friend look at it and he unplugged all the wires to the coils on the passenger side (coils and plugs 2, 4, 6, 8) and the truck kept running the same. What could cause this? He thinks maybe the PCM?
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Sunday, September 23rd, 2018 AT 2:52 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

I have seen a shorted injector cause half of the injectors to shut down on the side that is not working lets test the injectors by following this guide:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Here is the engine wiring diagrams so you can see how the system works. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Tuesday, September 25th, 2018 AT 10:57 AM

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