I have had the terraclean service done this morning, at my local garage, which was Autotech Garage Services, in melbourne, derbyshire.
What can i say apart from wow. What a difference this has made to my car.
Firstly when i arrived, the owner Roger, talked me through the whole process of what it all does and how it improves each part of the engine, he then asked me if i had any issues with the car relating to the engine.
It took around 1 hour to do, he also hooked up an ecu scan tool to show all live date from each of the sensors. the 02 sensor behind the cat wasnt reading any data prior to the terraclean and the other sensors were not properly reading or were unable to get an accurate reading.
He then started the service and after around 5 mins of the terraclean... the 2nd o2 started picking up data again slowly until it was back to normal. RESULT also the other 2 sensors were getting much better reads which was very promising.
also adding to this, the floor under my exhaust pipe was turning a dark black with all the carbon deposits.
After the service, he connected up all the fuel lines and stuff, and straight away the car sounded so much more quiet on idle, quite a remarkable difference really, also the exhaust sound muched smoother and crisper.
And the drive home was an absolute joy, much more torque and smoother acceleration, and even better mpg
I cant rate this service high enough, i will defo be having it done once a year at the autotech garage.