[jonzobot]

Much thanks for your input!

The Tercel 1997-1999 is definitely returnless, opening the hood shows no return line (I had thought I had a bad fuel pump last year and did a bunch of diagnosis). I am thinking that the linked regulator is either situated in the tank itself (lines for input, output, and to tank), or is for a previous model. My model has a dampener, but no regulator, on the rail.

I have a link but I have too few posts! But anyway, check out tercelreference[dot]com, it is a good site (created by none other than Daox) and shows that 1997+ models have the returnless system.