Thread: 89 S 10 fuel pump?
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Old 07-23-2011, 12:43 PM   #7
Oldsmobile Doctor
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Re: 89 S 10 fuel pump?
The pressure will bleed off while it sits that is why the ECM runs the pump when you first turn the key on. If the fuel system hasn't been opened like to change the filter it will come up to pressure almost immediately.
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