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

1988 cruise control problem

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Old Jun 11, 2002 | 08:53 PM
  #1  
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Default 1988 cruise control problem

Anyone have any advice on troubleshooting a crusie control problem on a 88 vette. Doesn't work at all. Any help would be appreciated. Thought it might be one of those well know problems.
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Old Jun 11, 2002 | 09:00 PM
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Default Re: 1988 cruise control problem (mjharris88)

In my case it was simply a matter of cleaning the terminals at the electrical connection nearby the servo-unit. After that it worked fine.
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Old Jun 11, 2002 | 09:24 PM
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Default Re: 1988 cruise control problem (mjharris88)

Not sure exactly where, but there is a vacuum line that controls the A/C and there is a tee for the cruise control. If the vacuum line is cracked, the cruise won't work. Gordon Killebrew gave a tech seminar on this at the Cruise In.
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Old Jun 11, 2002 | 10:19 PM
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Default Re: 1988 cruise control problem (Mr Mojo)

I also fixed mine by just cleaning the contacts on the plug. I also took it apart and blew out the insides with compressed air. There is also an oring seal inside the actuator that can crack or go bad. :cheers:
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Old Jun 12, 2002 | 01:11 PM
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Default Re: 1988 cruise control problem (mjharris88)

I had an inoperable cruise control on my 86. It would not do anything. After checking just about everything, it turned out to be a broken contact in the stalk. The "coast" button felt like it was working but the contact had come loose and was always in the "coast" mode. A new stalk was in order but I "temporarly" repaired it and sold the car soon after.

Good luck
:cheers:

Dennis
GrandSport #598
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Old Jun 12, 2002 | 01:22 PM
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Default Re: 1988 cruise control problem (Mr Mojo)

Not sure exactly where, but there is a vacuum line that controls the A/C and there is a tee for the cruise control. If the vacuum line is cracked, the cruise won't work. Gordon Killebrew gave a tech seminar on this at the Cruise In.
This happened to me. The cruise was inoperable and the A/C blew out of all vents no matter what the selection was. I band-aided the line and all is fine now.
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Old Jun 12, 2002 | 04:21 PM
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Default Re: 1988 cruise control problem (War Machine)

Exactly where is the line you "band-aided"...I have that exact problem: A/C out all vemts and no cruise control! Help!!!
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Old Jun 12, 2002 | 05:58 PM
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Default Re: 1988 cruise control problem (joseph p)

The line is behind the distributor on the drivers side. Mine broke a few inches from the tee while changing the wires. I band-aided it b/c I don't know where the other end goes, firewall maybe, but luckily it wasn't too far down. Pretty tight and dark back there. :D
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Old Jun 20, 2002 | 12:51 PM
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Default Re: 1988 cruise control problem (War Machine)

I don't know where the other end goes, firewall maybe....
I have the intake off and see the line goes into a wire loom behind the block and that loom goes into the firewall. I have only 3 inches of line that stick out of the loom. I'll look inside and see if I can find the line w/o taking the dash apart......yea right! :rolleyes:
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