Just curious - what is this on Mitch's car?

[ChrisCurtin]

Hi,

While trying to figure out wiring, I've looked in detail at lots of pictures of engine bays and noticed something on Mitch's for sale ad I hadn't seen before.

What it the black tube in the middle of the picture, zip tied to the wiring harness with the two black wires to the grey connector?

http://www.svocop.com/forum/attachment.php?attachmentid=4735&d=1373154623

[MikeFleming]

For the single-fuel pump models, there is a pressure switch (vacuum) that reduced voltage to the fuel pump circuit when not under a high[er] load. The switch and associated pressure hose is what you are seeing there.