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2004 stumble on start up

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Old Nov 4, 2024 | 06:39 PM
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From: St james mo.
Default 2004 stumble on start up
I have a 2004 base C5 that stumbles after sitting overnight on Startup. After that it will start right up and run all day perfect any ideas. I have a new fuel pump and clean the sender on the passenger siphon pump any help would be appreciated
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Old Nov 4, 2024 | 07:35 PM
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From: Dyer, IN
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Originally Posted by b2dmadmax
I have a 2004 base C5 that stumbles after sitting overnight on Startup. After that it will start right up and run all day perfect any ideas. I have a new fuel pump and clean the sender on the passenger siphon pump any help would be appreciated
What is your fuel pressure with key to on, not starting the engine ?
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Old Nov 4, 2024 | 08:07 PM
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From: St james mo.
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Originally Posted by lucky131969
What is your fuel pressure with key to on, not starting the engine ?
58 PSI at the fuel rail
my bad it's 52 lb just double check the gauge
goes to 60 on Startup and then back to 55 when I shut off
Last edited by b2dmadmax; Nov 4, 2024 at 08:14 PM.
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Old Nov 4, 2024 | 08:13 PM
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From: St james mo.
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Originally Posted by b2dmadmax
58 PSI at the fuel rail
my bad it's 52 lb just double check the gauge
goes to 60 on Startup
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Old Nov 13, 2024 | 06:56 PM
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From: St james mo.
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Originally Posted by lucky131969
What is your fuel pressure with key to on, not starting the engine ?
never heard anything back from you man what is up
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Old Nov 13, 2024 | 07:00 PM
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From: St james mo.
Default Bad gas
Originally Posted by b2dmadmax
goes to 60 on Startup
filled up almost empty tank with premium no alcohol and the stumble went away last three cold starts were perfect I'm going to pull the injectors and clean them just to be safe
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