May 6, 200520 yr On the SPFI throttle body, which fuel line is the input and which one is the output? I've got it setup with the upper one as the input and the lower one as the output. Is that right? I'm doing the SPFI conversion on Suby, lotsa fun!!
May 6, 200520 yr Line in from pump to bottom of throttle body. Line out from Fuel Pressure Regulator on throttle body to fuel tank.
May 7, 200520 yr Glad to help Had mine swaped at one point also. After I was redoing some intake manifold gaskets.
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