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04-26-2013, 11:30 AM | #1 |
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Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Pulsing/Surging Cruise Control
Cruise control pulses, or surges up and down when engaged. Sometimes it smooths out, other times not. '88 TBI 350.
Any ideas? |
04-26-2013, 04:10 PM | #2 |
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Join Date: Mar 2013
Location: lumberton tx
Posts: 575
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Re: Pulsing/Surging Cruise Control
Mine does it too. No idea. I put a new vaccum pod thingy on but no bueno
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04-26-2013, 04:19 PM | #3 |
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Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: Pulsing/Surging Cruise Control
I'm going to pull a vacuum on the cruise "solenoid" this weekend and see if it holds. Might just be a leaky vacuum line somewhere.
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04-26-2013, 04:32 PM | #4 |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,066
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Re: Pulsing/Surging Cruise Control
This would be my guess... not holding vacuum @ some point in the system.
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04-26-2013, 07:24 PM | #5 |
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Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,189
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Re: Pulsing/Surging Cruise Control
Mine cuts out on the downhill travel, will not hold below 45 mph. I replaced all the vacuum lines, actuator, brake switch, everything but the control lever on the column (1983 model year only type). That switch/lever was not available until recently, and it is too much to warrant replacement. There is a circuit board in a red plastic box under the dash, but that has to be sent into the aftermarket manufacturer and they are supposed to be able to repair it.
Converting to electric cruise I think makes more economic sense - vacuum is an unreliable method IMHO. |
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