Nice, thats the difference between FSI and injectors before the valves.
I don't think the terraclean would have made much difference to the valves tbh but what it may have done in the combustion chamber I cant say.
I did watch Ed china doing it to an old Jag?? and it made a massive difference to the emissions.
Glad you finally got round to doing the return valves, has it cured it?
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Del
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