First i never started an actual timer when doing the job. So 2h is a rough figure.
Second we run a first product through the fuel line.
Third once the fuel line is cleaned, we run another product through the air intake. And we do not need to strip everything.
So more efficient cleaning than the walnut method as injectors get cleaned up too
We know what we are doing you will realise once you are in the place.
I hope this helps
Cheers