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How to test a Fuel Cut off Solenoid

by xuxiaomin 05 Jul 2023

There is plenty to understand about your automobile, and today it's all about how to test a fuel cut-off solenoid. This is the process of checking fuel when the solenoid is cut-off. 

Finding out if the problem is a starter solenoid, starter, or battery can save you money and plenty of time when repairing it or looking to hire someone to do the repairing. Here is how to go about it:


Method 1


Open the Vehicle’s Hood


The solenoid and starter are situated on the vehicle's engine. Pull the hood release close to the driver's door to access it. You will have to discharge the safety latch at the vehicle’s front to open the hood. 

Check your vehicle's manual for specifics if you can't get to the safety release. 


Locate the Starter


Typically, the starter is where the transmission meets. It has a cylindrical shape featuring a tiny cylinder joined to it. You should see a cable directly moving from the battery’s terminal to the starter. 

Even though starters have different sizes, they have similar shapes. As with the first step, check your car's manual to see if you can find the starter. 


Pinpoint the Cylinder on the Starter’s Side


The solenoid is the tinier cylinder fixed on the side or atop the starter. This relatively simple electrical system can flop, hindering the starter from triggering and starting the engine. 

This solenoid will feature a pair of terminals protruding from its end. The cable from the battery will link to one of the two terminals.

When you Turn the Key, Pay Attention to Hear the Solenoid Click.


Have someone else turn the ignition key to try and start the car. Listen to hear the click once the starter solenoid is triggered. The solenoid could be functional but inefficient if you don't hear it click. Hearing the click without the starter engine moving translates to the solenoid transmitting electricity, just not enough. 

However, if it doesn't click, the solenoid isn’t engaging adequately, and it might not be because of a dead battery. 


Check the Vehicle’s Battery


If the starter doesn't engage, it could be due to insufficient energy on the battery. Low power can lead to the starter clicking but not the voltmeter on the battery's positive terminal and lead to a negative result on the negative terminal. 

A vehicle’s battery should read 12 volts before you try to start it. Therefore, if the voltage is low, consider charging the battery. 

With this technique, you can better understand how to test a fuel cut-off solenoid.


Related Questions 


What Should I Do When Fuel Solenoid Fails?


If this happens, it could trigger several issues, the most common being that the engine won't start. This happens because the fuel solenoid regulates fuel flow to the engine, so the engine won’t have fuel to run if it malfunctions. 

Other issues that could take place are stalling or rough running of the engine. In some instances, a fuel solenoid malfunction could damage other engine parts. 


What Runs a Fuel Cut-Off Solenoid?


This is a gadget that regulates fuel flow to the motor. It is positioned close to the fuel injectors in a lawn mower and close to the starter for the vehicle. An electrical jolt from the ignition triggers the solenoid. 

Upon activation, it lets fuel flow to the motor, but if the ignition doesn't engage, the solenoid deactivates, stopping fuel from flowing to the engine. 


What is a Fuel Cut-Off Solenoid and How Does it Work?


A fuel cut-off solenoid works to cut off fuel flow to the motor. Usually, it's situated close to the fuel injectors or starter for vehicles. An electrical jolt from the ignition system initiates it. When you switch on the ignition, the solenoid will open and make way for fuel to flow to the motor. 




If your vehicle doesn’t start, it could be a glitch with the fuel shut-off solenoid. The best way to be sure is to test the cut-off solenoid. Fortunately, this is an easy process involving the following steps:

  1. Open the vehicle’s hood.
  2. Locate the starter.
  3. Pinpoint the cylinder on the starter’s side 
  4. When you turn the key, pay attention to hear the solenoid click.

Check the vehicle's battery.

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