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C5 intermediate crank Issue! Please Help!

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Old Apr 10, 2023 | 12:25 AM
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Default C5 intermediate crank Issue! Please Help!

Hello All,

I have a 99 that's fresh off a engine replacement. When trying to turn it over, the starter will engage for half a second and stop, sometimes won't even try to engage. I've checked the closest grounds, ensured the battery is at good health, ensure wiring is correct, still can't get anything. Some ideas I have for possible problems:
It's a brand-new starter from Amazon, had good reviews but can't rule it out.
None of the ignition coils are plugged in, don't know if there's a security thing with that.
nothing else.

Does anyone have any thoughts or ideas? Thank you!!


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Old Apr 10, 2023 | 08:13 AM
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I’d be wary of any parts bought off Amazon…if you have a 12 volt test light hook it to battery negative and touch the tip of the light to a clean spot on the engine block…try to crank the engine…does it light ???…also how’s your battery ??…which grounds did you check and exactly how did you check them ??..with the car in neutral or park and wheels chocked did you try “jumping” the starter ??



Last edited by C5 Diag; Apr 10, 2023 at 08:41 AM.
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Old Apr 10, 2023 | 11:43 AM
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Unfortunately I suspect the starter, recheck the battery cables at the battery and at the starter solenoid ensuring they are clean and tight.
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Old Apr 10, 2023 | 04:42 PM
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I checked the two closest grounds on the front of the frame rails and the ground connections on the back of the head. Sanded and made sure of a clean connection. I have not tried "jumping" the starter. How would I do that?
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Old Apr 10, 2023 | 04:43 PM
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Will do, thinking of grabbing a starter form
Autozone and popping that in. If it doesn't work I can always return it
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Old Apr 10, 2023 | 04:57 PM
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Originally Posted by pnwq60
I checked the two closest grounds on the front of the frame rails and the ground connections on the back of the head. Sanded and made sure of a clean connection. I have not tried "jumping" the starter. How would I do that?
The 2 grounds on the front of the frame rails have nothing to do with the starting system and the ground on the back of the drivers head are for the coil packs…the battery ground is above the starter and is on the block…and if checking is a visual inspection that’s not how it’s done…do you have a test light and do the check I mentioned??…if you have a heavier gauge wire you jump those 2 terminals in the picture….trans in neutral or park and e brake on with wheels chocked…you’ll be jumping power directly to the starter.
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Old Apr 11, 2023 | 12:55 AM
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FIRST -- be certain that the battery terminals are clean and tight - 11 foot pound per FSM. Make sure you cannot move the side terminals around by hand when they are tight. There are some old reports of battery side terminal threaded holes being short. Even when the attaching bolt is tight, the terminal connection is not.

Then, check battery voltage ACROSS the BATTERY terminals, it should be 12.6 volts or slightly higher and the battery must pass a battery load test.

Then try jumping the starter.
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Old Apr 11, 2023 | 01:12 PM
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