JT's03
Registered User
The setup is single 255lph pump (2nd activated by boost switch although irrelevant for this discussion because it is not hooked up at the moment), 01 or 02 ford windstar fuel rail and regulator, -8 feed and return, yada yada... Wired directly to ccrm with a 30amp relay for key on (one on each pump) and the pump is 100% on when the key is on.
As the title states base pressure is reading 50-52psi at the rail confirmed by fuel rail pressure sensor and a marshall liquid filled mechanical gauge. Key on engine off 50-52psi, key on engine off pulling vacuum on the line manually I got it down to 42 psi. Engine running without vac 52 psi, engine running vac hooked up 46psi with -16 psig on the vac gauge for idle. Engine off key on applying pressure to the regulator via hand pump the pressure got up to 81psi so it pressure is rising with air pressure applied.
At first I thought the pump was overwhelming the regulator but now think otherwise because pressure goes down with vac hooked up. Wondering if I should keep this regulator in play and tune accordingly including base fuel tables or buy another regulator? Any insight would be greatly appreciated!!!
As the title states base pressure is reading 50-52psi at the rail confirmed by fuel rail pressure sensor and a marshall liquid filled mechanical gauge. Key on engine off 50-52psi, key on engine off pulling vacuum on the line manually I got it down to 42 psi. Engine running without vac 52 psi, engine running vac hooked up 46psi with -16 psig on the vac gauge for idle. Engine off key on applying pressure to the regulator via hand pump the pressure got up to 81psi so it pressure is rising with air pressure applied.
At first I thought the pump was overwhelming the regulator but now think otherwise because pressure goes down with vac hooked up. Wondering if I should keep this regulator in play and tune accordingly including base fuel tables or buy another regulator? Any insight would be greatly appreciated!!!