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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
Posts: 3,740
Weird $hit, man. My original yellow relay only turned on the pumps in response to air being drawn across the metering plate and thus activating the micro switch there. That's how it's supposed to work, to assure that your pumps don't continue to run in the event of an accident (where your motor is off, but fuel is squirting everywhere anyway. NOT GOOD, can you say fire)?

At one point I replaced the yellow dude, and now I get a short .5 second pump burst when first turing on the key. That's it, until I crank the engine and the pumps kick on.

Yours sounds like it's giving up the ghost, with 4 different operating scenarios. Your options are to replace the relay, or just keep it jumped and run without it - realizing that you would no longer have the overboost protection. If you're industrious, you can install an impact/collision switch that will kill power to the pump relays in the event of an accident.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 05-24-2010, 03:14 PM
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