Redline Injectors

Premium Fuel Injector Cleaning, Injector Flow Testing, & Ultrasonic Fuel Rail Cleaning

Premium Fuel Injector Cleaning And Flow Testing Service

Fuel Injector Cleaning And Testing

  • Traditional cleaning methods dating back to 1989, use mostly water and lightly dissolve tip deposits, leaving stubborn internal buildup and restrictions untouched. At Redline Injectors, we do things differently as we outline below.
  • As part of our standard premium service, you will receive new fuel injector components, including O-rings, filters, seals, spacers and combustion seals, with OEM options generally available for all injector types.
  • Restore maximum power and OEM-level performance with our injector service. Where compromise ends, premium begins. Don’t settle for less, go with Redline Injectors!
Service Price Guide Click Here to Order

Our Fuel Injector Cleaning and Testing Procedures

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What To Expect: Fuel Injector Service | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

What To Expect: Fuel Injector Service

  • Our premium fuel injector proprietary cleaning along with flow testing includes comprehensive static and dynamic flow testing performed both before and after cleaning for most non Direct Injectors.
  • You will receive new fuel injector components, including filters, O-rings, seals, caps, grommets, clips, spacers, decouplers, clamps, ferrules, caps, hoses or combustion seals, with OEM options generally available for all injector types.
  • If an injector fails our preliminary or electrical inspection or basic function tests before cleaning and subsequent testing, we will notify you of the issue a full refund that injectors service cost.
  • Some older top feed injectors are painted with spray paint, some of that paint may come off during the cleaning process, we do not repaint injectors as it is cosmetic, customers can repaint as desired. If you wish us to strip painted injectors let us know and we can light media blast them down to bare metal at no charge.
  • Sample Port Injector report can be found here.
Direct Injector DetailsBMW Piezo Injector Details
Injector Specific Test Benches | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Injector Specific Test Benches

  • Port and Throttle body type injector testing is performed on our Carbon Zapp GS8 Port injector test bench supporting pressures up to 95 PSI. Our test bench bench has been upgraded to run temperature-controlled calibration fluid, maintained at 75°–80°F for consistent, repeatable results. Our standard port injector flow testing always include BOTH Static and Dynamic tests for injectors that support both.
  • Port Injectors are flow-tested to evaluate performance, checking for leaks, blockages, spray pattern issues, and volume accuracy as well as Electrical Resistance, Short Circuit & Open Circuit Test.
  • Direct Injectors testing is performed on our Carbon Zapp GDR-X computer-controlled test bench, which supports pressures up to 5,000 PSI and includes both injector and calibration fluid heating capabilities.
  • Direct Injectors are flow-tested using OEM-style drivers, capable of accurately measuring volume of fuel injected into an engine cylinder during a single injection event as well as Nozzle response time, leaks, blockages accuracy as well as Electrical Resistance, Short Circuit & Open Circuit Test.
The Correct Test Bench
Injector Electrical and Functional Mechanical Testing | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Injector Electrical and Functional Mechanical Testing

  • We perform a basic electrical and pulse checks on each injector before beginning service using Multimeter. For high voltage injectors we additionally perform additional electrical insulation electrical using a Megohmmeter.
  • If an injector is found to be permanently defective BEFORE we begin cleaning and testing, we will not proceed with the service. Instead, we’ll issue a refund for the injector’s service cost, there is a $0 bench fee.
Proprietary Fuel Injector Cleaning Solvents | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Proprietary Fuel Injector Cleaning Solvents

  • We moved away from outdated, water-heavy injector cleaners (often 85% water) that have dominated since the late 1980s. We actually source a selection of true laboratory-grade chemicals from Lab Alley and custom-mix them in-house for injector specific cleaning applications. Our proprietary TrueFlow solvent is 100% waterless, using a blend of polar and non-polar solvents. Traditional detergents typically contain only 3–5% active solvent, with the rest made up of emulsifiers and surfactants; similar to fabric softeners; per their own SDS disclosures.
  • Our TrueFlow features a high-strength formulation: 30% carbon and varnish solvents, 60% petroleum-based degreasers and carbon removers, and 10% proprietary additives. It is safe for injector coils and electronics, yet aggressive enough to dissolve carbon and varnish on contact. Its effectiveness comes from a rare balance of high surface tension, low viscosity, and slow evaporation.
  • You don’t need multiple ultrasonic tanks of water based cleaning solution, what’s needed is a much better cleaning solution along with better Ultrasonic Machines.
More Information
Injector Exterior Ultrasonic Cleaning | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Injector Exterior Ultrasonic Cleaning

  • The injectors exterior is ultrasonically cleaned in a mild 90 degree solvent for a few minutes to remove external contaminants to prevent cross contamination. A low-pressure air flush clears any remaining solution.
Air Injected Cleaning | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Air Injected Cleaning

  • Traditional cleaning techniques rely on ultrasonic batch cleaning of the injector tip. While this can be effective for the tips, it does not address contamination within the internals of the fuel injector.
  • Stubborn injectors demand more than standard ultrasonic fuel injector cleaner; no matter how many tanks are used. To address this, we engineered a proprietary internal tip bench, designed in CAD and CNC-machined from billet 6061 aluminum. Injectors are secured in custom billet collets and submerged in a specialized chemical blend unique to this bench, as water-based ultrasonics proved ineffective for severe contamination.
  • Using low pressure air with specialized 20cc injector fluid feeder tubes we had designed (not shown), we flow our proprietary injector safe TrueFlow solvent while the injector is pulsed, ensuring solvent penetration from the top all the way down to the tip. The solvent quickly dissolves an injectors internal and external petroleum-based deposits; such as carbon, varnish, and lacquer; allowing the contaminants to be further broken up ultrasonically and the injector completely flushed clean using our Ultrasonic process.
  • After several minutes of pulsing, the process is completed with a high-pressure air flush and the injector is ready for injector specific ultrasonic tip cleaning.
  • *Not every injector is eligible to receive this treatment.
Proprietary Ultrasonic Cleaning | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Proprietary Ultrasonic Cleaning

  • Every injector receives this treatment at a minimum. We created an ultrasonic process using our proprietary TrueFlow waterless detergent blend of 100% polar and non-polar petroleum based solvents. Water based cleaners in ultrasonic tanks proved wholly ineffective for truly stubborn injectors.
  • We spent months developing this method with rigorous testing along with CAD modeling and precision CNC manufacturing of our ultrasonic plates and injector-specific adapters for our Elma ultrasonic machines. Although our fuel injector cleaning process is many times more costly and time consuming than traditional methods, the results proved to be well worth it.
  • Some older top feed injectors are painted with spray paint, some of that paint may come off during this stage of the cleaning process, we do not repaint injectors as it is cosmetic, customers can repaint as desired.
Standard Injector Backflush | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Standard Injector Backflush

  • Almost every top-feed, side-feed , and GDI injector receives this baseline treatment. We designed and machined custom adapter nozzles specifically for the Carbon Zapp GS8 test bench to accommodate every injector type the bench does not natively support. Heated N-Heptane is pressurized and backflushed through the injector while pulsed to remove loosened debris from previous steps. When combined with our air injected internal tip bench and ultrasonic cleaning using our TrueFlow solvent, this step often resolves performance issues. If problems persist, we proceed with our proprietary nuclear option, the POWERFLUSH procedure.
POWERFLUSH Fuel Injector Reverse Cleaner | Fountain Head Asset Management

POWERFLUSH Fuel Injector Reverse Cleaner

  • Our POWERFLUSH system was CAD-designed and CNC-machined from billet 6061 aluminum by our machine shop partners. It uses a regulated high-pressure Weldon pump with multi-stage 5-micron filtration, a proprietary electronics cabinet for safe injector control, and a fixture plate with interchangeable collets and cups to accommodate various injector types.
  • Not every injector requires every procedure. However, when problem injectors persist after standard fuel injector cleaning, we perform an additional high-pressure reverse-flow cleaning, our proprietary POWERFLUSH treatment. Injectors are removed from the test bench, and TrueFlow solvent is forced backward through them at high pressure for up to 10 minutes. This extended reverse flush removes stubborn varnish, gum, and debris through the injector’s intake, while the reverse-flow method keeps injectors cool and safely powered open for thorough cleaning.
  • We utilize the same TrueFlow solvent blend and temperature controlled to 85°F for additional cleaning effect.
  • On occasions an injector still shows issues at this stage, it is mechanical fatigue or wear.
  • *Certain models such as Mercedes piezo injectors are not eligible for the POWERFLUSH.
Heated Calibration Fluid | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Heated Calibration Fluid

  • We use the latest Carbon Zapp GS8 for all port fuel injector flow testing to determine if they are flowing within the required tolerances as well as electrical resistance, short circuit & open circuit test.
  • Our test bench has been upgraded to run temperature-controlled calibration fluid, maintained at 75°–80°F for consistent, repeatable results. Our standard port injector flow testing always include BOTH Static and Dynamic tests on injectors that support both. Depending on the injector type, we warm them for 2–4 minutes as well as performing testing at that temperature as well. For most injectors, the dynamic test consists of a full 60-second run to ensure a proper sample.
  • For direct injectors, our GDR-x computer-controlled test bench preheats both the test fluid and the injector for up to five minutes prior to testing as part of the test protocol.
Why Fluid Temperature Matters
Service Exclusions | Premium Fuel Injector Cleaning And Flow Testing Service | Redline Injectors

Service Exclusions

  • ​We do not service Diesel, CPI/SCPI Spider, FICHT injectors or Flux Capacitors.
  • See our Injector Type Page for visual references
Injector ID

Key Topics For Fuel Injectors

Importance Of Testing Fluid Temperature

When using n-Heptane as as example for a calibration fluid for fuel injector testing, temperature has a measurable and repeatable effect on flow; often more pronounced and predictable than pump...
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What are differences between Port and GDI Injectors?

Port injectors and GDI (Gasoline Direct Injection) injectors are two different types of fuel injectors used in modern internal combustion engines. The main differences between them lie in the way they deliver fuel to the engine, their position relative to the intake system, and their function in the combustion process.
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Difference Between Dynamic and Static Injector Testing

For Port Fuel injectors there are 2 types of testing, Dynamic and Static. Static injector flow refers to the fuel flow rate when the injector is held fully open, while...
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What are Signs of Clogged Fuel Injectors and How to Fix Them?

Clogged fuel injectors can lead to several performance issues in your vehicle, as they play a critical role in delivering the right amount of fuel to the engine for combustion....
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How often should I have fuel injectors cleaned and why?

Port, TBI, GDI and Piezo Fuel injectors should generally be professionally cleaned according to the guide below. At home and in-engine treatments can sometimes cause more problems than they solve....
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How To Test Fuel Injector Coils

When testing fuel injector coils, there are two primary methods: a resistance check and an insulation check. However, insulation testing applies only to piezoelectric injectors; it cannot be performed on...
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Shipping and Service FAQs

Service Related Questions

Yes, we have a 2 injector minimum.

Absolutely! Rest assured that we will take care of removing the injectors for you for (typically GDI and side feed) and invoice you for a bench fee of $10 per rail to do the work as problems can often arise. However, it’s important to note that we cannot be held responsible for any potential damage that may occur during the removal process. To ensure a smooth experience, we recommend that you personally remove the injectors from the rail.

To avoid any issues with shipping service secure them in plastic and tape them to prevent leaks.

For your convenience, side feed injectors will be re-installed in the fuel rails, top feed and GDI injectors will be packaged separately. GDI Injector clips are fairly easy to remove, you should not have no any issues, but if yours are tricky to remove we will can do it if you wish.

  • Service prices and options are posted in store per item type as well as on the pricing page. Service Pricing
  • Please check the Injector id injectors page on the menu if your unsure what you have. Injector ID

Turn around times are stated on the Home page.

We always replace filters, O-rings, seals, spacers, grommets etc. whenever they are available for the injector, this includes side feed injectors as opposed to cleaning them while still on the injector as most places do. They become fragile over time, why take a risk.

In fact we replace everything that is replicable.

Shipping Related Questions

For local drop/pick up service check the “Local Drop-Off” box on the order form.

Once order is places, email us at [email protected] for drop off instructions.

  • Shipping insurance up to $100 is automatically provided.
  • To add Shipping additional Insurance, please select amount coverage you’d like using the “Shipping Insurance” line item before checkout.
  • Additional shipping insurance is calculated for you based on $1.60 per $100 of declared value.
  • Please insure items based on their actual replacement value, extra insurance above the value will accomplish nothing, claims are on shipment value, not amount of insurance bought.
  • Insurance applies only to the item we’re returning to you.

Yes we will email the contact on the “Order receipt” that we get a copy of when you place your order.  Include your Name on a card or paper inside the shipment box as the shipping label sometimes gets obscured.

Include your Name on a card or paper inside the shipment box as the shipping label sometimes gets obscured.

We accept shipments from UPS, USPS, Fedex or DHL to following address 7 days a week.

Sending UPS is the optimal choice within the US, however.

Redline Injectors
3036 State Route 35 #227
Hazlet, NJ 07730

Include your Name on a card or paper inside the shipment box as the shipping label sometimes gets obscured.

​When preparing the injectors for shipping, it is strongly advised to place them inside a regular zip lock bag first. This will help to keep the fuel smell contained. It is important to avoid any damage during transit, so make sure not to simply toss the bag into a box without any additional packing material. This is particularly crucial for the pintle end.

It is not recommended to ship the injectors in a bubble envelope. Optimal protection can be achieved by using a box with some padding or a bubble envelope in a box. The small flat rate box from the Post Office may be good budget-friendly option for smaller injectors.

Send the injectors with all O-rings and related components, either installed on the injectors or placed together in a bag.

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