PETROL TEST FACILITY, NO DIESEL

Citroen

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 & Diagnostics. NO DIESEL
141 Google Reviews
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
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The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
User Image
Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
User Image
Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
User Image
Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
User Image
The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
User Image
Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
User Image
Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
User Image
Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
User Image
The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
User Image
Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
User Image
Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
User Image
Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.