Question about 1985 Pontiac Sunbird 4 Door

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1985 pontiac sunbird convertible

I had my cruise control set to 65MPH when I noticed the car losing speed and the temperature climbing. I got off the nearest exit to check. I saw no signs of leakage (antifreeze). I called AAA to tow me home. Once I got home I tried to start the car but it doesn't turn over. Looks like now I have multiple problems. Any advise?

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Ok when a car overheats the metal parts inside the motor expand and that will temporary lock or try to freeze your engine, y will recomend you to try to crak it again when cold, and if this will not help try to jump start the car, if you had a weak battery when this happened most likelly you kill the battery, use a very good size jumper cables or try with a diferent batterie and then have your car diagnose for the overheating problem.

Posted on May 28, 2008

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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!

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