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87 ABS Problem

Doug 87L98

Well-known member
Joined
May 25, 2005
Messages
59
Location
Doylestown,PA
Corvette
1987 Red Coupe
Before posting this I did a search about my problem and did not find a possible solution

I have a 87 Vette. This past March I installed a line-lock for drag racing. The install went smoothly and the line-lock worked correctly. I also autocross the Vette. While going through an autocross course I make frequent use of the ABS. And the ABS worked fine.

Recently at the drag strip the line-lock locked up and did not release. When I finally got the system to release the ABS light on the dash lights up. The line-lock system works now, but the ABS doesn't.

I thought there might be air in the system so I bled all 4 calipers. Took the Vette out for a test and slammed on the brakes and the ABS kicked in. As soon as I came to a stop and removed my foot from the brake pedal the ABS light came on again. So I bled all 4 calipers again and tried to reapeat my test, but now the ABS light comes on as soon as I pull out into the street.

I don't know what to do next. Any ideas?
 

safety_match

Well-known member
Joined
Dec 12, 2002
Messages
164
Location
Vancouver, BC, Canada
Corvette
1990 Bright Red roadster
I bought my '90 with the ABS light showing. The previous owner was honest enough to admit he'd had it checked and it wasn't the sensors so we knew it was something more serious.
I found a '90 ZR1 ABS computer on E-Bay from an east coast Corvette wrecker and bought it for $40 because for that price it couldn't hurt. Bingo! Life is good sometimes.

good luck
 

Greg Albers

Active member
Joined
Aug 11, 2006
Messages
38
Location
Corydon, IN
Corvette
1990 Coup Blk/Blk
ABS

I have a 1990 L98 Coupe. ABS light is on. I pulled the ABS codes and it says it is the left rear sensor. I pulled sensor and checked it and it is good. Did you pull codes before replacing ABS computer? If so do you remember what codes were set? I would like to chase this problem again when I get time.
 

safety_match

Well-known member
Joined
Dec 12, 2002
Messages
164
Location
Vancouver, BC, Canada
Corvette
1990 Bright Red roadster
Sorry, I can't help you. I didn't pull the codes, I simply changed the computer on speculation because it was cheap enough. For me it worked.
 

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