6 7 Powerstroke High Pressure Fuel Pump Failure Symptoms

Luckily there is an. The cp4 pump is internally lubricated by diesel fuel from the tank. This is from an audi tsb and shows what a high pressure fuel pump follower.

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6 7 Fuel Pump 11 To 16 Powerstroke Youtube

Diagnosing issues with these pumps isn t too difficult if you know what to look for.

6 7 powerstroke high pressure fuel pump failure symptoms. Contamination is the number one cause of repeat injector failure. That s an expensive repair you don t want to risk. The pump then sends the metal shavings through the entire high side and low return side of the fuel system. The metal would be from the high pressure fuel pump.

I was able to get it to a ford dealer who diagnosed the codes and said they showed a high pressure fuel pump failure. Each component carries a. As many 6 7l powerstroke owners have become painfully aware the high pressure fuel pump also known as a cp4 pump has a design weakness. Simply flushing the fuel system is inadequate and could lead to residual contaminants in your fuel system.

Replacing all of the fuel system components is the only way to prevent recurring contamination issues. Complete repair solution for powerstroke 6 7 with cp4 fuel pump failure or def contamination. The metering unit fca two terminal electrical fuel pressure regulator on top of the pump controls how much fuel is allowed into the two high pressure pumping chambers and therefore ultimately the rail pressure. The weakness of the cp4 pump lies in.

After lubricating the crankcase area of the cp4 pump fuel enters the high pressure pumping chambers and exits under pressure to the fuel rails and fuel injectors. The only cure in this case is to replace everything in the high pressure fuel system cp4. Over time vibrations can cause the wires to be exposed. High pressure fuel pump wire chafing.

2015 f 250 xlt 6 7l 2006 f 250. The last one i did stuck injectors open and kept trying to hydrolock on fuel matt ford senior master tech ford. 6 7l ford powerstroke carb approved disaster prevention kit how it works. When water is ingested it causes the pump to fail internally due to a lack of lubrication.

They also said a recent service bulletin from ford suggested a reflash of the computer to fix the problem. The fuel pump would have been a 3500 00 repair so i am glad the refash worked but i can t help but think this is only a. When the cp4 pump fails it will shed tiny particles of metal throughout the entire high pressure fuel system causing a number of serious 6 7 powerstroke problems. The 6 4l diesel is the first ford engine to feature a high pressure fuel pump mounted underhood in addition to a low pressure fuel pump located within the.

In the stock setup fuel supply to the metering unit first travels through the crankcase of the cp4 pump to keep thing lubricated then some goes back to the tank and some to. These high pressure fuel pumps are typically driven by a camshaft and are able to vary their displacement and output to match the needs of the engine. Early model year 6 4l powerstroke are susceptible to chafing on the high pressure fuel pump harness. High pressure fuel pumps can malfunction and or fail due to a number of factors.

They did the reflash and told me it worked. Once exposed you run the risk of shorting your high pressure fuel pump.