Why does my car idle rough when I'm parked or picking up speed or driving slowly?
I'm confused. Basically, your car can idle in only two ways, either in park or in gear with your foot on the brake and the vehicle motionless. The way the car behaves in those conditions is very telling to a trained mechanic. Some people will say the car is still idling if you take your foot off the brake but don't give it gas. (If the idle is set to high, the car might move pretty quick. That is undesirable.) That might be a third idle situation. Your car is not idling if it's accelerating. And if you are coasting and slowing down from cruising speed, the engine rpm will be higher than idle speed. So, that's not idling, either. It sounds like your car is always running rough.
What causes a 1998 suburban to turn off while driving happening intermittently usually after 20 minutes of driving?
When you are sliding something across a rough surface, such as a block on a table to a car driving on a road.the rough edges can be able to stop the object from moving and that we dont want! that is why you should lubricate a car so that the engine runs without running into rough surfaces and messing the whole car up!