Early 99 Cougars use a return fuel system and the later models use returnless sytems.
The return system sends fuel up to the injectors and any left over is sent back in the return line.
With the returnless system the computer monitors everything and the exact amount of fuel is sent to the injectors without any left over.
Thats how I understand it anyway.
1999 3.0L Cougar: 220fwhp and 200tq
2003 VW Passat W8 with 4 Motion AWD
http://www.cardomain.com/ride/300644
PM for intrest in 3L SVT Contours, 3L swaps into your current car, Prepped 3L engines, or anything 3L related.
