About Us

Mr Injector UK

- Dedicated 40 years’ experience in the automotive industry

- 30 years specialising in petrol injector diagnostics 

- One of the oldest established Asnu testing & service facilities

- Standard port, high pressure, side feed, K Jetronic, Air-assisted, cold start, Piezo, hose to rail and seized injector servicing

- Your injectors flow tested and serviced to perfection

- Race engine fuel injector balance & calibration testing

- Historic restorations available on injectors from the 1960s onwards

- Rail rebuilds

- Reconditioned injectors available

- New injector sales

- Petrol injector overhaul and seal kits available - seals, pintle caps & filters in stock

- ASNU Road Race & Track high performance injectors

- Custom kits available on request

 

Steve has now retired but is still available for advice and enquiries.

James runs the injector testing and servicing side of the business.

Sian supplies the injector rebuild kits under Master Injector UK.

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Mr Injector UK - Petrol Injector Servicing, Cleaning & Diagnostics, Also Historic Restoration.
116 Google Reviews
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Tony Harkett
March 19, 2025
Outstanding service on my 40+ year old injectors. Very helpfull and all as promised plus a very informative written report. Highly recommended.
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Steve Webb
March 12, 2025
Super fast turnaround and great communication. Datasheet shows everything carried out and will use again if needed!
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my way I did it !
March 8, 2025
I had 2 kits from Mr Injector , arrived very rapidly- Thankyou - , the seals and baskets fitted perfectly. My car is running really sweetly again. I did the DIY nozzle check with spray cans of carb cleaner , and a sonic bath . Found 2 to be leaking , but I had spares . Tested all used the best 6 . Really happy .Great availability if products and specialist knowledge. Thanks Again . X300 XJ6 1997 KIT 15 BLUE SEALS AND BROWN MICRO FILTER BASKETS. WD40 EASES THE PULLING OUT - TOP TIP !!!
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D M
March 5, 2025
Great service, delivered exactly what and when they promised. Can’t fault, thanks.
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Joe Mack
March 3, 2025
Extremely helpful, helped me identify what seal kit I needed for my vehicle and the delivery was very fast ! Couldn't recommend enough!!
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Jim Spillings
February 18, 2025
I don't think I have ever described any company as a 'Class Act' but this guy deserves this accolade for sure. Communication from before sending in the injections through to the detailed report and despatch details was excellent and honest. Thanks James & Sian.
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D W
February 11, 2025
Great communication, helpful when encountering issues and process is both easy and efficient. Wish I had used the service before I found out the painful way my injectors were duff! Back on track now, thanks!
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stephen brough
February 2, 2025
Excellent hassle free service. Serviced 6 forty year old Bosch petrol injectors and all working well.