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Author Topic: Cruise control speeds up  (Read 22 times)

Offline GrumpyRetiredGuy

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Cruise control speeds up
« on: Today at 12:10:29 pm »
1987 R10 350/700R4

After replacing the control arm on the steering column I was happy to see the cruise control works on this old girl. The issue is it  will not maintain a steady speed on a flat straight road. The speed creeps up as I'm driving. Any suggestions on what to check would be great. Thanks in advance and happy wrenching.
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Online bd

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Re: Cruise control speeds up
« Reply #1 on: Today at 02:31:54 pm »
Welcome to the Forum.  I suspect that either the servo vacuum valve solenoid is sticking and bleeding vacuum to the servo diaphragm, or the servo vent valve solenoid is sticking, or the module is failing.  See the Custom Cruise III manual for system operation.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)
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