1.-
Separate the two halves of Fuel Optimiser. Identify the fuel
incoming line. This can be done by finding the fuel filter and
following the fuel pipe to the engine. The incoming line can
usually be identified because it has more pressure and is colder.
The return line pressure is usually lower and it is hotter if
the engine has been on. When it is difficult to find the pipe it
is advisable to resort to the mechanic and ask them to indicate
the right pipeline.
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