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08 As GM gained experience with FI, it was found that with the engine off, fuel could run out of the bowl and into the cylinders. The next time an owner turned the key, the incompressible gasoline would lock up the engine. The electric starter, however, was strong enough to keep turning the engine, and a bent connecting rod would usually result. GM’s solution was to add an internal check-ball in the fuel path as a siphon breaker. Trouble is, these can fail without warning. A proven, reliable solution is the addition of an electric anti-siphoning valve between the fuel meter and the “spider” of copper lines that deliver fuel to the nozzles.