Engine misfire Code P2195

With all spark plugs black I would think the fuel pressure is low. Let's do a check and if okay I would replace the injectors. Here are two guides:

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

and

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

Are those OEM plugs got the right heat range?

Let me know I want to get this fixed. Ken

Good evening,

I wanted to help out as well.

Your fuel pressure is right on target.

A leaking fuel pressure regulator will allow unmetered fuel into the intake manifold above the injectors. I would check this. The diaphragm ruptures internally and fuel goes into the vacuum line to the intake manifold.

Roy

P2195
Descriptor
Probable Causes
Air Leaks After Mass Air Flow (MAF) Sensor
Camshaft Timing
Cylinder Compression
Diaphragm or EGR Vacuum Regulator (EVR) Leaking
Engine Oil Dipstick Improperly Seated
Exhaust Gas Recirculation (EGR) Valve Stuck
Exhaust Leaks Before or Near Heated Oxygen Sensors (HO2S)
Fuel Pressure High
Fuel Pressure Regulator Leaking
Gasket Leaking
Harness or Heated Oxygen Sensor (HO2S) Shorted to Voltage Power
Heated Oxygen Sensor (HO2S) Circuit Open or Shorted
Heated Oxygen Sensor (Ho2S) Damaged
Leaking or Contaminated Fuel Injectors
Low Fuel Pressure or Running Out of Fuel
Oil Overfill
Poor Mating Terminals and Wiring or Corrosion
Positive Crankcase Ventilation (PCV) System Leaking or Valve Stuck Open
Powertrain Control Module (PCM) Damaged
Vacuum Leaks
Vapor Recovery System
Water in Harness Connector

The fuel pressure regulator is attached to the fuel rail downstream of the fuel injectors. It regulates the fuel pressure supplied to the fuel injectors. The regulator is a diaphragm-operated relief valve. One side of the diaphragm senses the fuel pressure and the other side is connected to the intake manifold vacuum. Fuel pressure is established by a spring preload applied to the diaphragm. Balancing one side of the diaphragm with manifold vacuum maintains a constant fuel pressure drop across the fuel injectors. Fuel pressure is high when engine vacuum is low. Excess fuel is bypassed through the fuel pressure regulator and returned through the fuel return line to the fuel tank.

Got it.

Check that regulator for fuel coming out the vacuum port with the engine running.

Roy

This is starting to sound like a bad PCM. I would try a used/rebuilt unit to see what happens.

Ken has a very valid point but before I would assume it may be a PCM, I think you need to verify where the fuel is coming from in the plenum.

The regulator sticks in my mind as it is the only avenue for the fuel to get in there from the outside.

Roy

I attached the procedure and location of the regulator. It is on the fuel rail.

Pardon me for asking but how did you know there was no fuel at the vacuum hose if you do not know where it is located?

Roy

The fuel pressure regulator is attached to the fuel rail downstream of the fuel injectors. It regulates the fuel pressure supplied to the fuel injectors. The regulator is a diaphragm-operated relief valve. One side of the diaphragm senses the fuel pressure and the other side is connected to the intake manifold vacuum. Fuel pressure is established by a spring preload applied to the diaphragm. Balancing one side of the diaphragm with manifold vacuum maintains a constant fuel pressure drop across the fuel injectors. Fuel pressure is high when engine vacuum is low. Excess fuel is bypassed through the fuel pressure regulator and returned through the fuel return line to the fuel tank.

Okay, let us try again.

Remove the vacuum hose from the valve and run the engine.

Roy

No, the catalytic converter would have nothing to do with fuel in the intake.

Roy

This can cause a plug of the exhaust system which can cause mixture issues. I would check all of the catalytic converters to see if any others are falling apart and replace them. Here is a guide to help:
https://www.2carpros.com/articles/catalytic-converter-replacement

Please run down this guide and report back.

Cheers, Ken