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D_E_Bishop's avatar
D_E_Bishop
Explorer
Aug 22, 2015

Need help with the In-Tank pump, FOUND SCHEMATIC OL

I have written about the starve out problems I've been having with the 1989 Chevy naturedly aspirated 454 in our rig. I had it to a shop to repair what needed repairing so I would pass smog here in C...
eHoefler's avatar
eHoefler
Explorer II
Aug 22, 2015
You need to check fuel pressure on the supply side of the regulator, not the return side. On the return side you have nothing to restrict it to build pressure, it is open to the tank for return. The regulator is what causes/makes the fuel pump build pressure. You need to connect your gauge to the carburetor/fuel injector side of the regulator.

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