Fuel system tips on fuel pump troubleshooting, fuel injector testing and problem diagnosis, along with identifying symptoms and solutions to system parts.

Diagnosing Pulse Width Modulating Fuel Pumps

Old-School Diagnostics PWM fuel pumps are generally very reliable so, many technicians aren’t familiar with them. But now that many import vehicles equipped with PWM fuel pumps are rolling up the miles, electronically controlled PWM fuel pumps are becoming more common to see in your service bay. While pressure and volume testing are mandatory for…


Clean Fuel Tanks and Filters Save Pumps

Clean Fuel Tanks and Filters Save Pumps Fuel pump replacement comebacks can be costly and can hurt your reputation. One of the leading causes of failure is the tank. If a vehicle gets 20 miles to the gallon, then more than 5,000 gallons of gas (from many stations) will go through the tank in 100,000…


Understanding Electronic Fuel Injection

Virtually every vehicle built since the late 1980s and early 1990s have been equipped with some type of electronic fuel injection. Because of that, fuel pumps are a popular product line for shops to carry. A high-pressure electric pump is required to generate pressure so fuel will spray out of the fuel injectors when the…


Properly Perform a Fuel Pressure Test – Part 2

A fuel pressure test is often performed incorrectly, or sometimes not performed at all. This video will give you tips and tools you can use to accurately check fuel pressure.   Transcript: A restriction to the fuel supply reduces the flow of fuel to the engine. As long as the restriction is small enough, the…


Testing Electric Fuel Pump Problems with A Voltage Drop Test

Incorrect testing an electric fuel pump can give the impression that the fuel pump is bad. This can be avoided with a voltage drop test.


Recognizing Fuel Pump Symptoms and Good Fuel Pump Diagnosis

Dave gives us tips on how to recognize symptoms of a bad fuel pump, and how to perform a proper fuel pump diagnosis.        


Properly Perform a Fuel Pressure Test – Part 1

A fuel pressure test is often performed incorrectly, or sometimes not performed at all. This video will give you tips and tools you can use to accurately check fuel pressure.   Transcript: Hello, my name is Mark Allen, Product Manager for Mityvac, and I’m here to talk about how to properly diagnose a fuel delivery…


Proper Fuel Pump Repair and Replacement Procedure

In this video, Dave discusses additional fuel pump repair techniques that are often not in your procedure books and manuals.    


How You Can Help Reduce Costs of a New Fuel Pump

You can help reduce the cost of a new fuel pump in the long run by making sure you have a fuel pump that is qualified for warranty return before you send it back.    


Fuel Tank Cleaning To Avoid Debris Contamination

An often overlooked step in fuel pump replacement is fuel tank cleaning. Missing this key step could cause serious problems in the future.  


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