<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Johann:<BR><B> I think with FPR you mean the fuel pressure?</B><HR></BLOCKQUOTE><BR>Yup yup<P> <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Johann:<BR><B>How about looking at parts from the S60?</B><HR></BLOCKQUOTE><BR>No need, I already got something aftermarket and a lot better of course. <IMG SRC="http://www.swedespeed.com/ubb/wink.gif"> No faith in Volvo parts. <IMG SRC="http://www.swedespeed.com/ubb/tongue.gif"><P> <BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Johann:<BR><B>The fuel rail has what looks like a pressure regulator situated between the 1 st and 2nd injector but the problem is that I can't find a return line</B><HR></BLOCKQUOTE><BR>Exactly, there's no more return line setup from 70 series up and newer. However, it looks like the fuel rail from the 70 series and the 97 850 is still the same...unless I seriously ordered the wrong one, long story. But yes, I'd have to put a fuel return line in the system to make my Aeromotive FPR work. And hopefully that will solve the problem with car running lean at high RPMs. We'll also check if the fuel pressure is indeed dropping. <BR>It's funny how you ask most of the volvo ECU tuners, they'd simply tell you that everything is controlled by your ECU and if you are running lean, it's always software issue..never caused by small injectors and other misc hardware. Only if it was that easy...<BR>