How do you troubleshoot fuel system problems?
A fuel system should be carefully tested for pressure, volume, and electrical integrity before condemning the fuel pump. Often the first step in diagnosing a faulty fuel system is to simply listen. Turn the ignition key to the run position and carefully listen for a slight humming sound coming from the fuel tank.
How common are CP4 failures?
Despite all the noise over CP4 failures (and it is rampant on the GM and Ford Forums) the actual fail rate is very low. More than we’d like, more than the CP3, but still very low. The best thing to do is just make sure you buy your fuel from high volume stations, where you know a lot of diesel is being sold.
What year did GM go to CP4?
GM intentionally put a defectively designed CP4 fuel pump in every one of its 2011-2016 Duramax diesel trucks—and, as the court noted today, from mile one it will begin to fail. There is no fix. The only question is how much will it cost the customer? Generally the answer is in the tens of thousands of dollars.
How long do GM fuel pumps last?
It takes gas from the gas tank and sends it to the engine so your car, truck, or SUV can start and run. Your vehicle’s fuel pump should last at least 100,000 miles or more. If it doesn’t, or if you’ve exceeded that mileage milestone, you may notice any of the following seven signs.
What are the symptoms of a bad fuel line?
Usually a bad or failing fuel hose will produce a few symptoms that can alert the driver of a potential problem.
- Fuel odor. One of the first symptoms of possible issue with fuel injection lines is a fuel odor coming from the vehicle.
- Engine misfires, hard starting, and stalling.
- Fuel leaks.
Does Ford still use CP4 pump?
A new CP4 installed in still a CP4 with the same design flaws (when used in conjunction with ultra-low sulfer diesel fuel madated in the US) that have existed since CP4s arrived in the Super Duty trucks in 2010. It’s not been fixed. It’s still the Bosch CP4 high pressure fuel pump.
Why does CP4 2 fail?
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.
Is there a class action lawsuit against GM?
12, 2021—A new class action lawsuit has been filed against General Motors, GM Authority reported. The lawsuit alleges an equipment defect prevents airbag deployment and activation of the automatic seat belt pretensioners in certain frontal crashes, resulting in the death or injury of at least 1,298 people.
How do I know if my fuel pump is clogged?
The most common symptom of a clogged fuel pump is an intermittent power loss caused by the pump failing to push enough fuel to the injectors to keep the engine running properly. If your engine sputters or even stalls when you take your foot off of the gas, there may be an issue with your fuel pump or filter.
When to know if your GMC Sierra fuel pump is bad?
If your car isn’t starting at all, and you hear the fuel pump prime that is usually a good indication that the pump is working to some capacity. Testing your Sierra’s fuel pressure on each side of the pump would be the best way to diagnose this problem.
Why does Chevy Silverado not have fuel management?
In a statement to Reuters, GM spokeswoman Michelle Malcho said that the omission of AFM and DFM on new Chevy Silverado and GMC pickups is expected to lower fuel economy by 1 mpg.
What is the GM diesel truck fuel pump defect?
Consumers who own vehicles installed with a Bosch CP4 fuel injection pump may be affected by a GM diesel truck fuel pump defect. What is the GM Diesel Truck Fuel Pump Defect?
What are the symptoms of a bad fuel pump?
Also, the symptoms are almost exactly the same as bad/clogged fuel filter. Here are the most common symptoms of a bad fuel pump in your GMC Sierra: One of the most common signs that a fuel pump is going bad is a whining sound. The whining sound can indicate that the fuel pump is going out before there are any performance based issues.
