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The pumps should not be running. One problem.
Having said that , they should not be pumping fuel to the cylinders - without the engine running. You can have the pumps running but all fuel would/should be cycling back to the tank. It sounds like 2 problems. Pumps on and an injector(s) open. What I would do is pull the culprit area injectors, hook them up externally, and see if they are sraying fuel with pumps on. They should be closed. They should only be opening when the airplate opens - this mechanically opens the metering slits in the fuel head.
So , just double guessing this one - the pumps on has been a previous issue - but not noticed. Until an injector has failed to shut off .
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
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