Common questions

Is the CP4 pump really that bad?

Is the CP4 pump really that bad?

Why Is the CP4 Pump Allegedly Failing? The primary reason the CP4 pump is said to fail is because the pump was not designed for diesel fuel in the United States. Bosch is a European company, and Europe uses diesel fuel with more sulfur than U.S. diesel fuel.

Do you need to replace fuel pump on 2005 Dodge Ram?

Fuel pumps with the freeze plugs blown out will need to be replaced, and the core is not eligible for exchange. If you’re having troubles with 2005 Dodge Ram with 5.9L Cummins Diesel pumps, Taylor Diesel would love to assist you to.

What happens when the injection pump goes below 5 psi?

When you start going below 5 PSI, you are not supplying the injection pump with enough fuel to properly drive the injectors, and at the very least, you will experience a loss of power and fuel economy. Some customers will notice the truck “falling on its face” or flat lining with power as the pump simply cannot supply any more fuel.

Where is the fuel pump on a Duramax?

On a stock Duramax there is no electric pump in the tank or on the rail — unless you have dual tanks. The Bosch CP3, mechanical pump mounted in the engine valley, pulls the fuel from the tank via vacuum.

Which is the only fuel pump on a stock truck?

The CP3 is the only fuel pump on a stock truck, half of it is the injection pump and the other half actually sucks the fuel all the way from the tank. Are you throwing any codes?

Fuel pumps with the freeze plugs blown out will need to be replaced, and the core is not eligible for exchange. If you’re having troubles with 2005 Dodge Ram with 5.9L Cummins Diesel pumps, Taylor Diesel would love to assist you to.

On a stock Duramax there is no electric pump in the tank or on the rail — unless you have dual tanks. The Bosch CP3, mechanical pump mounted in the engine valley, pulls the fuel from the tank via vacuum.

The CP3 is the only fuel pump on a stock truck, half of it is the injection pump and the other half actually sucks the fuel all the way from the tank. Are you throwing any codes?

Why is my fuel pump not working properly?

When the fuel pump is not pumping properly, it might fail to send enough diesel to the fuel injectors to give your engine it’s proper horsepower levels. Since there are so many issues may be producing reduced power however, proper troubleshooting of the engine’s problem is critical.

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Ruth Doyle