Thread: Fuel delivery problems? 4.4 04
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Old 03-14-2018, 12:29 PM
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andrewwynn andrewwynn is offline
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A soft fail pump will also cause the siphon jet problem. If not enough pressure generated not enough pressure left to operate the siphon jet.

I've never personally witnessed a pump relay failure. If the pump's not spinning my bet is on the actual pump.

Measure voltage going into the pump. If 12ish pump is shot.

You should check the o-ring on the siphon jet at the same time since the failure is visible it doesn't need to be running.

Wondering how you got to the parking lot with zero psi fuel
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