Mercedes CGi

Mr Injector UK has been working in petrol injector diagnostics and restoration for the past 30 years. We are one of the oldest Asnu test facilities.

Our top of the range Asnu machines allow us to test and service top feed standard port, high pressure (GDI, HPI etc), Siemens / Bosch Piezo and side feed petrol injectors.

The Method:

Your injectors are pre-cleaned, inductance load tested and run on a test rig as they would operate on your engine to check for any anomalies, we record this pre-service information on your report sheet.

All parts are removed then we ultrasonically clean and backflush before returning to the ASNU test bench for dynamic analysis, which includes spray pattern checks, leak off and dynamic balance checks.

If they are metal-bodied EV1/Weber/Lucas type injectors, they would also be stripped of paint and rust, etched and hot bake painted in heat resistant paint. 

After the service, new parts are installed where applicable and the report is sent across to you with the findings.

The result is a beautifully cleaned and balanced set of injectors with restored flows and brand-new parts, ready to reinstall straight back into the vehicle. 

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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.