Five cylinders are not working

203,862 MILES • 4.7L • V8 • 4WD • AUTOMATIC
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MJPA
  • MEMBER
  • 2 POSTS
What would cause it to not hitting on 5 of the cylinders?
Sep 22, 2019 at 5:12 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Hi,

I assume you have 5 cylinder misfires? If so, what are all the codes that you have?

I assume the engine barely runs if at all so we may have significant engine damage to have it this bad.

Let me know your codes and we can go from there. Thanks
Sep 22, 2019 at 5:56 AM
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MJPA
  • MEMBER
  • 2 POSTS
P0123, P0113, P0505.
Sep 22, 2019 at 6:09 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Okay. I am not sure why you were saying it was missing on 5 cylinders? With these codes it may be running really rough but you actually don't have any misfire codes so it is not actually missing.

I attached all the diagrams for each of these codes. They are all circuit codes so I suspect you are going to have a wiring issue or a problem with the PCM. However, my money would be on a wiring issue.

Start with the TPS code and work through it. More than likely it will fix the other two codes if you fix that one. However, if it does not fix the others when that is repaired then just move onto the IAT one. Lastly the IAC.

I suspect it is running poorly because of the IAC code but again, I think they are all related.

Let me know if you have questions. Thanks
Sep 22, 2019 at 11:40 AM
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