80's 454 fuel supply challenges
Long time first time. I have an 86 The Executive with a newish crate 454 and 95 Chev TBI on top of it. On a recent trip, we had some intermittent stalling except when I'd step on the gas at which p...
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PSI was at 32 after the electric pump, but that was at idle. My guess is that the switcher was open a little but not enough to allow for flow, so it released the pressure in idle, but then gasped for more fuel. I'd love to put a second pump on, but I'm not sure where the power comes from for it to reset it.
Will give the ECM a tap; when they put in the TBI the positioned the ECM under the passenger seat... Lots of extra wires in the doghouse, labeled, but just hanging out there. I'm seriously considering having a standard carb put on to simplify all of this.
When I bipassed the switcher and just had the one electric pump drawing gas, a previous backfire issue went away, which made me think the return line was also blocked by the switcher causing a bit of gas to remain and ignite.
Will give the ECM a tap; when they put in the TBI the positioned the ECM under the passenger seat... Lots of extra wires in the doghouse, labeled, but just hanging out there. I'm seriously considering having a standard carb put on to simplify all of this.
When I bipassed the switcher and just had the one electric pump drawing gas, a previous backfire issue went away, which made me think the return line was also blocked by the switcher causing a bit of gas to remain and ignite.
