Professional Mail-In Fuel Injector Cleaning Service

Ultrasonic Cleaning & Flow Testing for Automotive & Marine Injectors

Weymouth, MA · Mail-In Service Across the US

Send Your Fuel Injectors to Our Professional Cleaning Lab in Weymouth, MA

Fuel injectors get dirty. Carbon deposits build up over time, restricting flow and messing with the spray pattern. That's when you start noticing rough idle, poor gas mileage, misfires, and a general lack of power. Fuel additives can help with light buildup, but once deposits have hardened, the only real fix is professional ultrasonic cleaning.

At South Shore Injector, every set of injectors we service goes through a complete ultrasonic cleaning, backflushing, and individual flow testing process. We don't guess. We measure. Each injector is tested before and after cleaning, and you receive a detailed Injector Performance Report showing exactly how your injectors are performing.

We're based in Weymouth, Massachusetts and work with customers across the South Shore, Greater Boston, and the rest of the country through our mail-in service. Just fill out the order form, ship your injectors using the prepaid label we provide, and we'll send them back cleaned, tested, and ready to install. Insured shipping is included both ways.

We service gasoline fuel injectors for cars, trucks, boats, motorcycles, ATVs, snowmobiles, and personal watercraft. Whether it's a set of Bosch port injectors from a daily driver or Mercury Optimax injectors from your outboard, we've got the equipment to get them flowing right again.

What We Do

Before & After Data

Every set comes with a detailed Injector Performance Report: flow rates, spray patterns, and leak test results for each injector. You see the numbers before and after cleaning, not just a promise that it worked.

Fast Turnaround

Most orders are cleaned, tested, and shipped back within 1–3 business days of receipt. We keep you updated when your injectors arrive and again when they're on their way back.

Professional Equipment, Real Results

Automotive, Marine & Powersports

We service gasoline fuel injectors from all major manufacturers for a wide range of applications.

Automotive

MPFI, GDI, and TBI injectors from Ford, Honda, Nissan, Subaru, BMW, and more. OEM brands including Denso, Bosch, Delphi, Siemens, and Keihin.

Marine & Powersports

Mercury Optimax air & fuel injectors, Yamaha GDI, Tohatsu TLDI, plus motorcycles, ATVs, UTVs, snowmobiles, and personal watercraft.

What Our Customers Say

Real reviews from real customers on Google.