Unleash your vehicle's true potential with 803 Services
At 803 Services, we specialize in EFI diagnostics, repair, and performance tuning for a wide range of vehicles in Saint Clair, MI. We are mobile and come to you in the Saint Clair County Area.
From performance cars, UTV's, ATVs, Motorcycles, Jet Ski's, Snowmobiles and anyone that is seeking EFI Diagnostics and Repair. We ensure your engine runs flawlessly and delivers maximum power or if you are seeking best fuel economy.
Our expert EFI services
We offer a comprehensive suite of EFI services tailored to meet the needs of car enthusiasts, performance shop owners, and daily drivers alike. Our consultation-first approach ensures you get the right solution for your vehicle.
EFI Diagnostics & Repair
Experiencing engine issues? Our state-of-the-art diagnostic equipment pinpoints problems accurately, allowing for efficient and effective repairs of your electronic fuel injection system.
Performance Tuning
Unlock hidden horsepower and improve drivability with our custom dyno-tuned calibrations. We specialize in optimizing EFI systems for all types of performance vehicles.
Consultation First Approach
Every journey begins with a conversation. Our fixed-fee initial consultation ensures we understand your needs and recommend the best course of action. This fee is credited towards your final invoice if you proceed with our services.
Specialty Vehicle Services
Whether you own a UTV, ATV, motorcycle, jet ski, snowmobile, or a modern sports car, our EFI expertise extends to a diverse range of specialized vehicles.
“803 Services transformed my classic car. The diagnostic process was thorough, and the performance tuning made it feel like a brand new vehicle. Highly recommend!”
— John D., Classic Car Restorer
Connect with 803 Services
Service Area:
Saint Clair County, MI, United States
Business hours
Friday, Saturday & Sunday
10:00 AM - 8:00 PM
Monday - Thursday: Closed