Menu

Shop

Garage

Cart

Account

Products to Compare (max of 3)
X
Compare These Parts

Cleaning Fuel Injector Nozzels

4/27/2020
Add Article To List

Cleaning injector nozzles should be a part of your normal maintenance program. To get started, disconnect the fuel line from the barrel valve. Next, use your leak down gauge to blow the fuel out of the barrel valve and injector lines. This is also a good time to check where your barrel valve is set. To do this, you will need to also cap off the secondary outlet of the barrel valve with an AN6 cap. This should not change from week to week. If you notice a change in percentage, you need to check to make sure all linkages are tight. Leave injector lines connected during this process. Speedway offers several gauges for this, including; Speedway Dual Gauge Leakdown Tester Tool, Speedway Singe Gauge Leakdown Tester and Longacre Engine Leak Down Tester.

After checking the barrel valve, I will spray WD-40 in the barrel to help lubricate the o-rings in the valve and prevent gumming up. Now you’re ready to use your 7/16 wrench and loosen all the injector lines. Using a 5/8 socket, you can now remove the injectors from the manifold. I use an Ultrasonic Multi-Purpose Parts Cleaner for this process. If you don’t have an ultrasonic cleaner, you can use brake or carb cleaner

Once the nozzles are done in the ultra-sonic cleaner, you need to blow them out with compressed air. Always blow the opposite direction of flow so any debris is blown out of the nozzle and not into it. Hold the nozzle up to a light and look threw it to make sure the nozzle is clean. Repeat this process for all 8 nozzles or all 16 if you're running both up and down nozzles.

After all the nozzles have been cleaned, you can reinstall them. I like to spray a little dab of WD-40 on the o-rings before installing to help keep the o-rings soft and to ensure they seal properly. Do not over tighten nozzles...snug is fine. You can now connect the injector line to the nozzle. Start the lines with your fingers before using a wrench to avoid cross-threading the lines. Once again do not over tighten the lines. Once all lines are tightened, you can reconnect the fuel line to the barrel valve. The job is now complete.

Products Featured in this Article

Related Articles

Tuning Tips after Header Installation
9/23/2024
Making the switch from manifolds to headers is a popular performance upgrade, but it may take more than just bolting on the new part. We provide some tips and things to consider after you bolt on a new set of headers.
Fix An Overheating Race Engine | Beyond The Cooling System
by Jason Orth - Posted in Tech
5/22/2024
Overheating is a major cause of DNFs and damaged engines. We'll go beyond the cooling system for solutions to your overheating issues.
How to Choose a Racing Harness
by Speedway Tech Team - Posted in Tech
5/10/2024
Having a difficult time deciding which racing harness to use? With many options to consider from size to closure type, this article will walk you through how to go about choosing the perfect one for you and your race car. Safety first!
How to Mount a Modified Race Car Body
by Joe McCollough - Posted in Tech
3/21/2024
Learn a few tips on how to properly mount Modified bodies and some products that will help get your race car body fabrication job done!
How Does Race Car Ballast Placement Affect Handling?
by Joe McCollough - Posted in Tech
2/2/2024
Race car ballast can have a significant impact on your car's performance and handling. Here are some notes and tips to help you to correctly place ballast in your car.
Understanding Caster and Camber for Suspension Setup
by Speedway Tech Team - Posted in Tech
1/16/2024
Caster and camber are critical adjustments to your car's suspension alignment. It's important to understand what caster and camber are as well as how they can affect your car's performance.
Top Holiday Gifts for Race Car Drivers 2023
by Mark Houlahan - Posted in News
11/16/2023
Not sure what to get that race car driver in your life? Don’t worry, we’ve got your back this holiday season with our 2023 gift guide!
HANS Device Buyers Guide: Choosing & Sizing a Head Neck Restraint
by Jack Hall - Posted in Tech
8/24/2023
HANS Devices are life-saving devices that offer superior protection vs. foam neck braces for all different types of motorsports.
Speedway Tech Talk - How to Measure for a Racing Suit
12/29/2021
Learn how to properly measure and fit for a racing suit in this helpful article
Selecting Quarter-Turn Fasteners
by Jason Lubken - Posted in Tech
8/13/2021
There are several types of quarter-turn fasteners used in the performance automotive aftermarket and in this buyer's guide we'll help show you the correct fastener for your application and how some of the most common types of fasteners are used.