Fuel pressure drops to 0 after 10 min. on shut down

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03-26-2017, 03:00 PM

oldsgt

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Fuel pressure drops to 0 after 10 min. on shut down

My fuel pressure drops to 0 after shut down. On restart injectors tap loud for 30 sec. Is there a pressure valve that holds the fuel pressure after shutdown ?

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03-26-2017, 03:07 PM

projectSHO89

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Yeah, there's a check valve built into the fuel pump assembly.

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03-26-2017, 03:46 PM

oldsgt

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Thank you! I thought that might be it.

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03-26-2017, 04:25 PM

glc

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You sure that it's the injectors that are tapping? I'd suspect the lifters, what brand oil filter are you using?

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03-26-2017, 05:33 PM

oldsgt

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I have a stethoscope and it is the fuel injectors not the lash adjuster. after the pressure drops they tick for about 30 sec. I thought it might be the lash adjusters at first too. I use Mobil 1 .

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03-29-2017, 01:48 AM

oldsgt

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It was the fuel pump

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03-29-2017, 09:17 AM

Roadie

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Couldn't you have turned on the ignition for a few seconds before starting to allow the pressure to build before starting?

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Fuel pressure drops to 0 after 10 min. on shut down

Fuel pressure drops to 0 after 10 min. on shut down

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