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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...
turbojimmy's avatar
turbojimmy
Explorer
Aug 22, 2015
You state that it's dying on hills. If it runs at all, it's not likely the fuel pump. If you really had 0 pressure on the output side of the regulator, it would not run at all. You have to measure pressure with the engine running (ideally when it's misbehaving), or during the three-second or so fuel pump prime when you turn the key on.

Need more symptoms for a guess at the cause. When you say it won't climb hills, what's it doing? Just no power? Any backfiring or sputtering?

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