Fuel Injector Cleaning & Flow Testing Services

Fill out and Print the Service Order Form Fill in your name, phone number address and any other information along with an email address for return tracking. No need to send payment in advance, we'll call when the job is complete for payment and shipping. Send your fuel injectors to our Rockville Centre, NY shop for a quick turnaround. We offer cleaning for all automotive and marine fuel injectors.

We install proper filter baskets, o-rings, spacers, and seals using the highest quality components available. You recive the injectors fully assaembled and ready to install. Call us at 516.442.4707.

  • Most common MPI Top Feed Injectors Auto, Marine - $22.50
  • Side Feed & Optimax Gas - $25.00   
  • OptiMax Air $35.00
  • GDI Direct Fuel Injectors - $25.00
  • Hose Feed Injectors - $30.00

We do not service Diesel  E-tec or BMW index injectors(piezo)

Mail Injectors with Order Form To:

SouthBay Fuel Injectors

566 Merrick Road Suite 3

Rockville Centre NY 11570

The inclusion of ethanol in contemporary gasoline requires consistent fuel injector maintenance to ensure peak engine performance and fuel efficiency. Off-the-car fuel injector cleaning is crucial. Quick fixes with "out-of-the-can" cleaners are not only ineffective but also potentially harmful, as they may introduce contaminants into the fuel injector's small filter. SouthBay Fuel Injectors reinstates complete functionality to injectors by replacing all necessary components like o-rings, pintle caps, spacers, and filters, offering this service at a much lower cost than buying new or rebuilt injectors. By employing the latest ASNU Classic GDI fuel injector Flow Benches,SouthBay's established process effectively restores fuel injectors to their original OEM condition.

Flow Testing
Fuel Injector Cleaning
  • Benchmark test injectors

Before we can accurately compare before and after results we have to set a benchmark. All injectors are put on the test bench "as they come" to our shop. Injectors are tested for leakage at 80 psi. They are flowed both Static and Dynamically. All results are noted and will appear on your service report.

  • OHM test injectors for maximum electrical performance

One of the best ways to check for faulty injectors is to use a multi-tester, sometimes called a multi-meter. Testing continuity by using the OHM setting will tell you if the connection through injector is within normal limits or if it has opened and is no longer useable.

  • Remove internal filters, O-rings and pintle caps

External parts and filters tend to deteriorate with time and extreme operating conditions and stress from everyday use. Never reuse these parts.

  • Clean external injector body ultrasonically

Three-step ultrasonic cleaning employs cavitation bubbles generated by high-frequency pressure (sound) waves to agitate a liquid. This agitation exerts strong forces on contaminants attached to substrates such as metals, plastics, and ceramics. It also reaches into blind holes, cracks, and recesses. The goal is to completely eliminate all traces of contamination that are tightly adhered to or embedded within solid surfaces. Our equipment utilizes ultrasound (typically ranging from 20–400 kHz) and a suitable cleaning solvent.

  • Clean fuel injector internally with ultrasonic technology

The technology employed in our external cleaning process is also utilized for internal cleaning of the injector. However, during internal cleaning, the injector is pulsed while it resides in a heated ultrasonic bath at various intensities. This method effectively removes any residual contaminants from the internal components of the injector.

  • Flow test to verify proper atomization and injector flow characteristics

The injectors are reinstalled on the test bench to verify their flow rate, spray pattern, and leak down. Initially, they are tested statically to assess size and flow comparison. Subsequently, they undergo dynamic flow testing on a computer-controlled test bench. This involves firing the injectors sequentially from 600 to 10,000 RPMs, cycling through pulse widths of 3ms to 12ms. This procedure mimics various throttle positions and driving scenarios. Should the injectors fail to meet specifications at this stage, the cleaning process is repeated.

  • Use industry standard fuel injector calibration fluid

We utilize only the finest calibration fluid for all our testing equipment. For accuracy, we use a fluid that closely resembles gasoline without actually being gasoline. Specific gravity is defined as the ratio of a substance's density to the density (mass per unit volume) of a reference substance. The apparent specific gravity is the ratio of the weight of a given volume of the substance to the weight of the same volume of the reference substance, which in our case is gasoline. This factor, combined with the correct temperature, can make the difference between a good tune-up and a great one. All tests are conducted using SouthBay's Calibration Fluid at 20°C (±1°C), 3.0 Bar (±0.01 Bar), 13.8V (±0.05VDC), with a saturated driver and RC cutoff. Injector flow rates are determined based on tests with SouthBay's Calibration Fluid (0.741 g/ml) in comparison to U.S. EPA emission test gasoline 40CFR86.113 (0.735g/ml).

  • Reassemble Injectors

All parts removed before the external cleaning process are replaced with new OEM parts tailored to your specific injector. 

Copyright © 2021-South Bay Fuel Injectors, Inc. All rights reserved.