Indicates a vacuum leak possibly from a brake booster failure
when in park the idle is good but when you select gears or slowing down you have your foot on the brake
SOURCE: warped front discs
Here is what happens to cause this, rotors are as thin as poss to reduce weight and increase MPG, when you turn them you remove material and make them even more prone to warping the less steel the less heat they can dissipate, the hotter they run the more the are prone to warp, if you tow something the problem is compounded. To avoid the same issue in the future replace the rotors with name brand new ones, use the best brake pads available, cheap pads can and do cause rotor problems. I worked as a tech for 30 years and this explanation is what I learned in many brake classes I went to and in shop with hands on experience.
SOURCE: Vibration when in gear, and stalling.
The problem is the torque converter solenoid. I had it happen on my 94 Cavalier a few years back and was a cheap fix at the local car mechanic. What happens is the transmission warms up and hits a certain speed where the solenoid engages, but then it sticks and won't disengage until it cools down sufficiently. When it sticks, it causes the car to shake when slowing down and will snub out the engine if you come to a stop.
SOURCE: Rotors keep warping. Parking brake=caliper sticking?
well first of all just because they can be turned dosent always mean that you should do it, now a days rotors are alot cheaper to just replace them, however whatch where you buy them. in most cases you get what you paid for, Like cheap rotor prices=less life, same for the pads and how hard the driver uses the pedal. and as for the "classic rotor warp" thats not always the case with these newer cars having more movable joints than ever befor, it could be, bad hub bearing,bad lower ball joint...etc....good luck
SOURCE: Corvette 1990 5.7L Slow Idle Automatic
i had almost the same problem i changed my fuel pump and fuel filter and it worked u mite try that first.
SOURCE: why do my rotors wear out prematurely on my 02
Warping does not mean they are wearing out. What is happening is the rotors are getting too hot, too quickly. Waiting until the last moment to break for a redlight would do it, so would a drive-through food service place like McDonalds because of all the friction and heat generated in a relatively small area of the rotor.
It could be possible for your break calipers to not be mounted properly, but you would have heard some odd noises and the steering wheel would fight you every time you hit the brakes.
Be very mindful about how many times you have the rotors 'turned'. Making them too thin is a good way to destroy an entire vehicle when they suffer an epic failure. Youtube has several videos on driving tips to help you be easier on your vehicle and save money on gas.
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