PETROL TEST FACILITY, NO DIESEL

Bosch

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. 

Thumbnail
Mr Injector UK - Petrol Injector Servicing & Diagnostics. NO DIESEL
131 Google Reviews
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
User Image
Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
User Image
Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
User Image
Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!