should my fuel pump run continiously with key on if I have bleeder valve under hood open

10

Asked by May 28, 2015 at 06:22 PM about the 2000 Chevrolet S-10 2 Dr LS 4WD Extended Cab SB

Question type: Maintenance & Repair

truck won"t start after sitting a few days.Fuel pump has 24000 miles on it new pressure
regulator and filter.Smells flooded when trying to crank.If I turn key on and hold bleeder
valve under hood down should pump continue to run.Pump is pumping very good thru
filter and at intake with lines loose

7 Answers

79,135

No, it should stop after 3 to 5 seconds if the engine is not running. As a safety precaution when the computer determines the engine has stopped (less than 600 RPMs) the fuel pump is shut off. Sounds like the fuel pump relay is stuck. HTH. -Jim

10

swapped horn and fuel relays to no avail.It will almost start at times and seems to be running at 25rpms but won't catch up.When it finially does crack operates perfectly no rough idle or hesitation and will start back normally.

1 people found this helpful.
75,205

Check the fuel injector,s,

1 people found this helpful.
79,135

You'll also want to check the fuel pressure at the fuel rail. If it's excessive the fuel pressure regulator is suspect. But first, find out why the fuel pump is running continuously. That shouldn't be. HTH. -Jim

1 people found this helpful.
10

fuel pump isn't running constant.truck was running perfect last week,left for holiday weekend and 4 days without running now can't get it to start at all even with starting fluid.I'm baffed working fine when parked,actually made a 300 mile trip pryor to parking it.

79,135

Remove the spark plugs and make sure they're not gasoline fouled. If they are replace them and look for a fuel problem. Bad injectors or bad fuel pressure regulator. My guess is that one or more injectors leaked down and fouled out the plugs. You can try holding the accelerator to the floor while cranking. This puts the computer in clear flood mode. HTH. -Jim

815

Another way to test for a bad or continuous running fuel pump is to Disconnect the Battery? It should shut off immediately !

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