Question about 1994 Buick Skylark

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When driving at highway speeds, it hesitates every once in awhile even with the cruise on or off. It does this when accelerating up hills too. It doesn't do it when driving around town..

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Sounds like it needs a good tune up...could be a plug miss firing, or plug wire, even my be cap or roter..

Posted on May 21, 2011

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Posted on Jan 02, 2017

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1 Answer

What causes the speed to fluctuate when you set the cruise control?


if it just started to happen you may have lost a magnet off the drive shaft. If it is a front wheel drive then you would have two magnets on the flywheel if you lost one magnet it would cause problems.
The other possible cause if the sensitivity setting is set too sensitive then the cruise control will surge .
Setting it lower will allow it to slowly respond to speed changes but if going up hill it will take a while to increase the acceleration . Or going down hill it could accelerate too much before the cruise control realises it is going downhill
Also a very wet road can cause the wheels to spin and cause the cruise control to lose the plot and accelerate to dangerous speeds.
I have had this happen to myself once so be wary of cruise control use in wet conditions.

Jan 14, 2017 | 1992 Honda Accord

1 Answer

When cruse is set, why does it not hold going down hill


Cruise control only maintains speed by utilizing the accelerator. To speed up it increases it and during slowing is removes it. The cruise control will not apply brakes in the event of a steep downhill run. In this case the vehicle will start to accelerate in the same manner as if the cruise control was not engaged. But in theses cases, most cruise controls, once the speed exceeds a certain amount above the set speed, will auto-disengage as a safety feature.

Oct 04, 2016 | 2004 Chevrolet Silverado 2500HD

1 Answer

I have a 1984 Lincoln town car and the cruse control works fine on the straight away but when the car starts up a hill it cancels out like if you touch the brake


Fixing Faulty Cruise Control - Popular Mechanics



www.popularmechanics.com/cars/how-to/a116/1272586/

So you tap the brakes and disengage the cruise control to avoid conversation ...holding to a legal speed on both the uphill and downhill sections of the interstate. ...Actually, it will normally drop out if the engine has to work too hard, mainly ... But, it may well propel your new economy car to blatantly illegal velocities unless ...

Sep 28, 2015 | 1984 Lincoln Town Car

1 Answer

2006 Ford Five-Hundred. ODBII: P0171, P0174, P061B, P2106


I suggest check the easy things first. Vacuum lines, could cause a lean condition, fuel filter restricting the fuel flow lean condition. Carefully clean throttle body with proper cleaner. I'm a shade tree mechanic but these simple things work sometimes. You didn't mention if you have the cvt trans. If you do and you are going 75 80 on the highway coming to a hill will cause it to race that high. Then when the hill is crested it will slow down, I don't like it either but it is the nature of the beast. I often cancel the cruise on big hills on the highway so it doesn't do that.

Mar 06, 2014 | 2006 Ford Five Hundred

1 Answer

Vehicle stalls when turning and at highway speed


Check motor mounts and transmission mount
Also check the air tube (TOP AND BOTTOM) for hairline crack.

A loss motor mount can cause excessive vibration and damage the air inlet tube.

Jan 15, 2014 | 1991 Buick LeSabre

1 Answer

What would cause my '02 Camry to hesitate, buck,


Even though there is no check engine light I would still take it to Auto Zone to see if there are any stored codes.

Jul 16, 2009 | 1992 Lexus ES

1 Answer

CVT problem


Simple answer, no, it will not most likely cause any increased wear to your engine or transmission. Yes, it is normal for the engine to rev while climbing a hill while in cruise control.

The cruise is designed to be used on flat (or semi-flat) stretches of highway at 55mph or higher so you don't have to hold the fuel pedal the whole time and your foot doesn't get tired. The cruise control system will try it's best to keep your vehicle rolling at the set speed, increasing/decreasing the throttle to compensate for changes in engine load.

If you are driving with cruise on, try lightly putting your foot on the pedal and you might notice that the system will actually move the pedal itself. If you are in cruise, and you come up to a large hill, try putting your foot on the pedal and getting it up the hill on your own w/o cruise then resetting cruise once you are off the hill.

Also, cruise is not supposed to be used in moderate/ thick traffic or on country roads with a lot of rolling hills. The cruise control system is a "dumb" system meaning (not that it's pointless) but it will only change the pedal as the speed changes and it has no idea what's coming up next, even while you are already on the hill.

So, it is normal operation of the cruise control to try to compensate for a hill by constantly revving up the engine and letting it fall back down to try to keep moving at the exact same speed you set it for. If this is a bother, you can always use your foot to hold the pedal while climbing the hill normally.

Don't worry, it won't cause any increased wear and tear on your vehicle. I hope this helps. Good luck and don't forget to rate! Thank you!

Mar 01, 2009 | Mitsubishi Outlander Cars & Trucks

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