C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ratcheting noise in first

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Old Nov 14, 2016 | 04:53 PM
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Default ratcheting noise in first

i some times hear a weird noise when pulling away from a stop. sounds like a wratchet, or maybe pulling up and ebrake, or a loud electric fuel pump...seems to come from the front drivers side of the car but i could be wrong. noise doesnt persist, maybe 3 to five seconds...
any thoughts?
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Old Nov 14, 2016 | 04:54 PM
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auto....
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Old Nov 14, 2016 | 04:56 PM
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use your phone and try to record teh sound then upload to youtube and post the link
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Old Nov 14, 2016 | 05:10 PM
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Air pump?
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Old Nov 15, 2016 | 11:21 AM
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ABS test that happens around 3 MPH when first driving the car?

Last edited by JimLentz; Nov 15, 2016 at 11:21 AM.
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Old Nov 15, 2016 | 01:07 PM
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Originally Posted by JimLentz
ABS test that happens around 3 MPH when first driving the car?
I thought of that but that is behind the drivers seat.
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Old Nov 17, 2016 | 08:49 PM
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The first noise is the shifter from park to drive. Don't know if it's discern able on this recording. Maybe lasts for about a second once I'm moving.

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Old Nov 17, 2016 | 08:58 PM
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thats going to be tough to diagnose.

icant make it out.

how many seconds does it last?
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Old Nov 17, 2016 | 09:35 PM
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Maybe one". I'll get a vid with my kids phone....its much newer than mine....
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Old Nov 18, 2016 | 12:13 AM
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If it only does it once when you put it in gear after starting it is normal. Just testing the ABS open the door behind the drivers seat you will hear it better. :thum bs:

Last edited by antfarmer2; Nov 18, 2016 at 12:15 AM.
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Old Nov 20, 2016 | 04:43 PM
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Originally Posted by JimLentz
ABS test that happens around 3 MPH when first driving the car?
Originally Posted by antfarmer2
If it only does it once when you put it in gear after starting it is normal. Just testing the ABS open the door behind the drivers seat you will hear it better. :thum bs:
How long have you had the car. Is this the first time you noticed the noise?
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Old Nov 20, 2016 | 08:58 PM
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Just bought it, only had one other vette, a 68 in 1982...
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Old Nov 20, 2016 | 10:31 PM
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Originally Posted by jayinnh
Just bought it, only had one other vette, a 68 in 1982...
I think your good to go. It's basically self test for the ABS system. Will do it in forward or reverse after engine is started.

Learning curve much different than the 68. Get a FSM. What year?

Just drive the car and enjoy.

Last edited by pcolt94; Nov 20, 2016 at 10:32 PM.
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Old Nov 21, 2016 | 11:31 AM
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thanks all
its a 93
is the fsm available anywhere in pdf?
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