COVID19 UPDATE - We are keeping a close eye on the current situation and in line with latest government guidance we will remain operational until further guidance clarifies otherwise. If you have any questions, concerns or wish to postpone please do give us a call on 03336000669. We do still have our self-tuning options available: for those vehicles which are supported.


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Dyno Developed Software & Unrivalled
Technical Support.


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An ECU Remap for your exotic car
can significantly improve your driving


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ECU Remapping your Turbo Diesel has
never been so easy. With improved power
and fuel economy one simple step away.


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Tuning your truck can improve your pulling
power and fuel economy. See how Celtic
Tuning can help you and your fleet.


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Towing power is essential for any
farmer. Improve the power and
fuel economy of your tractor with
an ECU Remap.


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Testimonial Fiat Reviews

Fiat Ducato 2.0 JTD 84 bhp

Check Fiat Ducato stats

Posted on 27th July 2019, 19:05

I just wanted to say what a difference the remap has made to our 16-year-old motorhome.

It feels more powerful right through the gears and going over the downs is not the gear change challenge it was. Even my wife came home today and said Martha is going along easier. and the service was 1st class.

Simon Petter

Worthing, United Kingdom

Not an actual picture of the tuned car

Fiat 500 0.9 TwinAir 85 bhp Petrol

Posted on 2nd November 2017, 20:24

Not an actual picture of the tuned car

Had my fiat 500 retuned by Celtic Tuing and what a big change to the 500 its so much better to drive the extra power and torque to the engine has made it fantastic to drive.

Thank you to Kev from Celtic who did all the work!!!

Mark Pozzetto

sales executive

Horsham, west sussex, United Kingdom

Fiat 124 Spider 1.4 MultiAir Turbo 138 bhp

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Posted on 16th July 2017, 11:41

I have great pleasure in providing a testimonial for George Williams Geewiz Diagnostics technician with Celtic Tuning.

George remapped my Fiat 124 Spider, a complex and difficult job requiring the removal and opening of the ECU. To say that this job was complex is an understatement. Using state of the art equipment skill and determination George successfully completed the job. His care and attention to detail and knowledge was second to none. I am seriously impressed by George's skill and have no hesitation in recommending him and Celtic Tuning to others thinking about remapping their car.

The change in the cars performance is astonishing.


Retired AMHP

LIVERPOOL, Merseyside, United Kingdom

Fiat Ducato 2.8 JTD 146 bhp

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Posted on 23rd December 2016, 19:30

Not an actual picture of the tuned car

I do not usually write testimonials but I am so pleased with the remapping Celtic Tuning did on my Fiat Ducato based Motorhome. The improved performance is all I could have hoped for and the vehicle is now a real pleasure to drive.

Paul Tutt

Bideford, Devon, United Kingdom

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