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no crank / fuel pump??

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Old Nov 15, 2024 | 11:47 AM
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Default no crank / fuel pump??

Hello,
My 2005 C6 is my daily. Yesterday when leaving work or attempt to leave my car would not crank when pushing the start button. It seemed like a low battery issue. I heard a click noise. Some odd electrical things happened like my aftermarket stereo head unit rebooted. Headlights turned on, horn honked like I was leaving the fob in the car when I shut the door... When trying to jumpstart there was no click noise or crank. The car is nearing 117xxx miles and I have noticed the fuel pump making noise at times. Sometimes I hear it sometimes I don't. (driver side in front of the rear tire.)
Anyway if the fuel pump completely failed would the motor still crank but not start or will the computer knowing there is no fuel pressure make the motor not crank?
Thanks
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Old Nov 15, 2024 | 12:20 PM
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If the fuel pump failed, the motor should still crank. this sounds like maybe a battery corrosion/connection issue
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Old Nov 15, 2024 | 12:45 PM
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It is the battery, purchased in 2021. There is no corrosion, first thing I looked for.
It strange the jump start didn't work last night. I looked at the fuel pump relay and it does have some browning on it so I swapped it with the horn relay since the are the same then tried a jump start and it started right up!
Looks like I need a new battery plus replace the brown relay.

It is now a good day.
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Old Nov 15, 2024 | 02:44 PM
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Originally Posted by Teamjnz
Hello,
My 2005 C6 is my daily. Yesterday when leaving work or attempt to leave my car would not crank when pushing the start button. It seemed like a low battery issue. I heard a click noise. Some odd electrical things happened like my aftermarket stereo head unit rebooted. Headlights turned on, horn honked like I was leaving the fob in the car when I shut the door... When trying to jumpstart there was no click noise or crank. The car is nearing 117xxx miles and I have noticed the fuel pump making noise at times. Sometimes I hear it sometimes I don't. (driver side in front of the rear tire.)
Anyway if the fuel pump completely failed would the motor still crank but not start or will the computer knowing there is no fuel pressure make the motor not crank?
Thanks


The car will crank but NOT start and get your battery checked out.
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Old Nov 15, 2024 | 03:02 PM
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Originally Posted by C5 Diag
The car will crank but NOT start and get your battery checked out.
Issue was the battery , fixed.
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Old Nov 16, 2024 | 04:05 PM
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Originally Posted by Teamjnz
Issue was the battery , fixed.
Curious, is it a M6? My 05 M6 vert had to be in reverse after shutdown to keep from eating the battery.
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Old Nov 16, 2024 | 06:40 PM
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Originally Posted by Malfeitor
Curious, is it a M6? My 05 M6 vert had to be in reverse after shutdown to keep from eating the battery.
My 05 has an A4 trans. There was really no signal the battery was getting weak. Car started in the morning and super dead in the evening. Glad it was a battery instead of an electrical gremlin.
At first I was thinking the fuel pump died and the car wouldn't crank since there was no fuel pressure.
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