Injector Cleaning
Fuel injector cleaning is one of the best things you can do for a high mileage engine that's lost a bit of its edge. Carbon buildup inside injectors is normal and happens to every engine over time, but cleaning them out makes a real difference to how the car feels to drive. From sharper throttle response and smoother power delivery, the benefits of fuel injector cleaning are immediately obvious. For a tuned car especially, injectors flowing evenly and spraying correctly is the difference between the engine performing as intended and leaving power on the table. Here at Awesome GTI, we use ASNU ultrasonic cleaning equipment, the same kit trusted by OEM manufacturers and serious engine builders.
ASNU ultrasonic
Industry-standard cleaning rig, used on GDI and MPI injectors
Initial & post-clean test
Flow, spray pattern and leak measured before and after
Per-injector report
You get the numbers on every injector we touch
Fitting service
We can remove, clean and refit on-site as a package
What is Fuel Injector Cleaning?
Your injectors are basically tiny valves that spray fuel in a very precise pattern, thousands of times a minute. When carbon starts building up inside them, that pattern goes off and the flow across the set becomes uneven. The engine management tries its best to compensate but there's only so much it can do, so you might feel it as a slight roughness or a car that just doesn't pull like it used to.
Clean them out and it's a different story. We test every injector before and after the ultrasonic clean so you can see exactly what changed, and you get a written report on each one.
What Does the Fuel Injecting Cleaning Service Include?
We test flow rate, spray pattern and leak-off, which is then followed by the ASNU ultrasonic clean. After that we retest to measure the improvement and confirm everything is back where it should be. You’ll get a full report on each injector so there's no guessing what condition they were in or what the clean achieved.
Performance filter baskets and graphite seals are available at £5 per injector for direct injection fitments where compatible, which is worth doing while they're already out. The service also pairs well with a full intake valve carbon clean if your engine has been building up deposits on the inlet valves, which on direct injection TFSI engines is a matter of when, not if.
Fuel Injector Cleaning in Manchester
We're based in Irlam, Manchester and have been doing this since 1989. Book the car in and we'll take care of the full removal, clean and refit. Alternatively, you can send us your injectors by post. Ring us on 0161 776 0777 to discuss your options.
Frequently Asked Questions
How often should fuel injectors be cleaned?
Every 40,000 to 60,000 miles is a sensible guideline for most VAG engines. Direct injection TFSI engines tend to build carbon faster than port injection equivalents, so if yours falls into that camp it's worth staying on top of it. If you're running a tune, keeping your injectors clean is part of getting the most out of it. After all, a remap is only as good as the hardware delivering the fuel.
How much does fuel injector cleaning cost?
Direct injectors (GDI) are £30 inc VAT each. Port injectors (MPI) are £15 inc VAT each. Performance filter baskets and graphite seals are available at £5 per injector for direct injection fitments where compatible. For removal and refitting pricing, or to add a rolling road session before and after to see the real-world difference.
Is fuel injector cleaning worth it on a tuned car?
Absolutely. A remap optimises fueling based on what the injectors can deliver, so if they're partially blocked or flowing unevenly the tune isn't working as it should. Getting the injectors cleaned and confirmed as flowing correctly means your engine is actually running the numbers your remap was written for. It's one of those jobs that makes everything else work better.
Can I send my injectors to you by post?
Yes. If you're not local or you'd rather pull them yourself, just give us a call before you send them over so we can log your details and note anything worth flagging before testing starts. Return postage is £7.99. We'll send you a full report on each injector once the work is done.
How it works
Enquire
Call us first — we'll take your details and discuss any concerns.
Quote
Send the injectors in, or drop the car for a full removal + fit service.
Book in
ASNU ultrasonic cycle, then post-clean flow + spray test.
Hand Over
Per-injector report in hand. Return postage £7.99, or refitted at the workshop.
Combine with an Intake Valve Carbon Clean
TFSI direct-injection engines build carbon on both the injectors and the inlet valves. A combined injector clean + intake decoke restores the whole top end in one visit.
Awesome LTD
Unit 1 Siemens Road,
Northbank Industrial Park,
Irlam, Manchester, M44 5AH
Phone: 0161 776 0777 (option 1 for workshop)
Hours Mon-Fri: 8:30am - 5:30pm
Saturday: 8:30am - 12:30pm
Sunday: closed