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No Start.......Any insight?

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Old Jul 31, 2025 | 11:59 AM
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Default No Start.......Any insight?

I have a 2017 C6 base model 6L
this morning it turns over when I push the start button , turns over good no start. Let off the start button and the starter keeps turning over the engine, push the stop button and it quits.
First thing I try is disconnect the battery for a while...No help. Check all fuses....no help . switch around relays of same part #. still no help.
There has not been any electrical work of any kind prior to this. I welcome any ideas that anyone may have.
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Old Jul 31, 2025 | 12:13 PM
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turns over good no start. Let off the start button and the starter keeps turning over the engine, push the stop button and it quits

I've seen that happen when the fuse box in engine bay goes bad. However without troubleshooting we will be guessing. Any codes?
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Old Jul 31, 2025 | 12:34 PM
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With a crank no start you may have a fuel delivery issue…either a faulty low pressure fuel pump or no injector pulse…can also be ignition related…ie no spark…if you have a scan tool and can read RPM during cranking if you have no RPM that may signify a bad crank sensor…with a bad crank sensor you will have no injector pulse and spark…if you are not familiar with this testing seek out an auto diagnostic shop in your area…not a general repair shop or dealership…they will just replace parts.

Last edited by C5 Diag; Jul 31, 2025 at 12:48 PM.
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Old Jul 31, 2025 | 12:56 PM
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Here are some diagnostic aids if you are attempting to diagnose this yourself…moving this to C7 Tech for discussion !!…OP, do you indeed have a 2017 ????






Last edited by C5 Diag; Jul 31, 2025 at 01:01 PM.
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Old Jul 31, 2025 | 12:59 PM
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Don’t the engines crank around 250 rpm? Wouldn’t you see that on the tach if the cps was good?
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Old Jul 31, 2025 | 01:08 PM
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Originally Posted by FatsWaller
Don’t the engines crank around 250 rpm? Wouldn’t you see that on the tach if the cps was good?

On a C5 you will…on a C6 no (do a clear flood crank on your car and see if you see an RPM signal on your Tach)…C7 I’m pretty sure no also.
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Old Jul 31, 2025 | 01:17 PM
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Originally Posted by Beargo
I have a 2017 C6 base model 6L
this morning it turns over when I push the start button , turns over good no start. Let off the start button and the starter keeps turning over the engine, push the stop button and it quits.
First thing I try is disconnect the battery for a while...No help. Check all fuses....no help . switch around relays of same part #. still no help.
There has not been any electrical work of any kind prior to this. I welcome any ideas that anyone may have.

Do you have a 2017 OR 2007 ??????…I moved this back to C6 Tech…can you enter the correct year.
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Old Jul 31, 2025 | 03:29 PM
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It's a 2017 and I found the problem...The Fuel pump fuse was making a bad connection, I tweaked the fuse legs, and it fit tight and problem solved.
Thank you folks for such a prompt response to my post.......now a Happy camper again.
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Old Jul 31, 2025 | 03:37 PM
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Great !!…To avoid confusion down the road can you edit your profile ??

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Old Jul 31, 2025 | 04:57 PM
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Don't know how 2007 c4 got in there....It's a 2017 c4 base model.
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Old Jul 31, 2025 | 05:02 PM
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Originally Posted by Beargo
Don't know how 2007 c4 got in there....It's a 2017 c4 base model.
If Corvettes are new to you the 2007 is a “C6”….a 2017 is a “C7”…what is a model “6L” ??

Last edited by C5 Diag; Jul 31, 2025 at 05:15 PM.
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Old Jul 31, 2025 | 06:48 PM
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I’d say in this case a little more precision is needed:

Generation Years
C1 1953–1962
C2 1963–1967
C3 1968–1982
C4 1984–1996
C5 1997–2004
C6 2005–2013
C7 2014–2019
C8 2020–Present
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Old Jul 31, 2025 | 10:51 PM
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Also if it's a 2017, it's not lemans blue. Probably laguna blue.
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Old Aug 1, 2025 | 12:51 AM
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Could be a Frankenstein monster mash car of all those years and colors.
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Old Aug 1, 2025 | 08:27 AM
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Thanks.....I'll look in to that. Got to get the right touchup paint.
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Old Aug 1, 2025 | 08:29 AM
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It's a 2007 'Twas a fat finger error on the keyboard. my bad!
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