Codes P0300, P0175 and P0172, 17 seconds after ignition?

Tiny
SHIPP2MYLULU
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  • 2018 RAM 2500
  • 6.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 199,893 MILES
Hi, I am completely stumped I can't find it what am I missing. I pretty much rebuilt the Hemi from ground up this summer the winter every sensor is new crankshaft all of it timing is dead on done by the dealership oil pumps new just put a new fuel pump in it. What am I missing? 2 new injectors and the rest were cleaned, replaced the 2 that leaked. But I'm still running rich 17 seconds after detonation. I do have live data from Freeze Frame and can provide any other information both Up stream o2 sensors are new but I'm not even running long enough to get the reading off of them without the misfire all new plugs and coils, short runner valve new. EGR been cleaned new map sensor, k&n air filter cleaned and charged. Please help. Thank you
Wednesday, June 14th, 2023 AT 2:26 PM

5 Replies

Tiny
KEN L
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This looks like you have a fuel injector leak or excessive fuel pressure. Can I ask how the engine is running also if you pull the spark plugs out what do they look like? Here is information on the codes:

P0300: Random/Multiple Cylinder Misfire Detected

P0175: System Too Rich (Bank 2)

P0172: System Too Rich (Bank 1)

The fuel pressure should be 58 psi +/- 2 psi.

This guide can help you check it:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Also, sometimes when injectors get cleaned it makes them stick open so they may need to be replaced. These codes are telling you the fuel consumption cannot be controlled.

The fuel pressure regulator is located in the fuel pump module assembly and is non-serviceable. Please upload images of the spark plugs once they are removed. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Thursday, June 15th, 2023 AT 1:11 PM
Tiny
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Here is the latest freeze frame data.
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Thursday, June 15th, 2023 AT 9:20 PM
Tiny
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Thursday, June 15th, 2023 AT 9:21 PM
Tiny
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Thursday, June 15th, 2023 AT 9:22 PM
Tiny
KEN L
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Thanks for the readings, it looks like you have a bad ground or the PCM is bad, these readings are all over the map. I would check the ground to the engine and chassis. Also, make sure all of the engine grounds to the main engine harness are clean and tight. Here is how to change out the PCM in case you need it. You can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what you find.
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Friday, June 16th, 2023 AT 7:37 AM

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