noise while backing up

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Sep 9, 2002 | 06:59 AM

jtfrog

Thread Starter

Racer

Joined: Jun 2002

Posts: 296

Likes: 0

From: Auburn ca

noise while backing up

On my 1986, when i back up and start to apply the brake i here a noise that sounds like a pump is comming on. The gentelmen I bought the vette from said it was an auto ride hight adjustment. I dont feel any rise. Does anyone know what this sound might be/

Jtfrog

Sep 9, 2002 | 08:36 AM

chucks88

Safety Car

Joined: Oct 2001

Posts: 4,763

Likes: 1

From: Connectivette

Re: noise while backing up (jtfrog)

Mine does that too. I think it's the ABS

Sep 9, 2002 | 08:51 AM

vader86

Team Owner

Joined: Sep 2001

Posts: 62,139

Likes: 1,728

From: Athens AL

C7 of the Year - Unmodified Finalist 2021

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Re: noise while backing up (jtfrog)

its the ABS resetting itself when you reach 4mph

Sep 9, 2002 | 10:48 AM

ittlfly

Safety Car

Joined: Feb 2002

Posts: 4,212

Likes: 10

From: Sun City West Az

Re: noise while backing up (vader86)

My '92 has made that noise backing up since it was new. It is the ABS system doing it's thing and is normal.

Sep 9, 2002 | 12:00 PM

dlmeyers

Burning Brakes

Joined: Feb 2000

Posts: 824

Likes: 2

From: Camden SC

Re: noise while backing up (ittlfly)

Yup, ABS self test. Sometimes called BITE (Built In Test Equipment) or in other applications, BIT. This system is heavily engineered and the system is checking the pump circuit, relays, etc. There is a note in the service manual telling service reps this is normal and not a problem. Enjoy.

dlmeyers 90 coupe zf6 3 speed shocks

Sep 9, 2002 | 12:42 PM

konroh

Racer

Joined: Feb 2002

Posts: 455

Likes: 0

From: Fraser MI

Re: noise while backing up (dlmeyers)

Quote:

this is good to know, i was afraid something was wrong when mine did that!!!
:cheers:

Sep 9, 2002 | 08:35 PM

2UHONEY

Racer

Joined: Dec 2001

Posts: 418

Likes: 1

From: Henryville PA

Re: noise while backing up (jtfrog)

Yep, it's called "the fart" in slang, as far as I know every Vette with ABS does it, but I know someone with a '91 vette with ABS that has never done it, and HE'S WORRIED ABOUT IT.