A fouled plug, bad plug wire or bad coil pack.
U have a blown head gasket,cracked cylinder head or cracked block.. The white smoke is from water getting into the Exhaust system.
Could be bad muffler bearings.
timing off
The muffler is an important element of a vehicle's exhaust system. The purpose of a muffler is to reduce the noise and emissions that occur when your vehicle emits gases during operation. Similar to other parts of an automobile, a muffler can go bad and need to be repaired or replaced. An ineffective muffler gives warning signs to let you know when it is time to replace it. Knowing the symptoms of a bad muffler can help you diagnose the problem and eliminate other potential issues. Prolonging muffler repairs can lead to expensive maintenance cost in the future.Noise From Your MufflerAn engine produces a great deal of noise when it is in operation. A primary sign that your muffler needs repairing is a loud noise that comes from your vehicle when you start and drive it. Generally, your car will make a low rumbling noise that can escalate to a severe knocking noise if not treated. At times, a muffler may make a hissing or rattling sound at the onset of a problem. If you notice a continual noise when your start and drive your car, you should take your vehicle to an automotive mechanic shop to have your muffler inspected. In some cases, a muffler may need a simple repair and not a total replacement.Inspect the MufflerAnother way to detect a muffler issue is to physically inspect the muffler. The muffler is located underneath a vehicle near the rear. A muffler covered with rust or soot may be an indication that it needs to be repaired. You should also look for any holes in the muffler. A hole in a muffler needs to be repaired quickly because vehicles emit dangerous gases when in operation. A vehicle may also experience performance issues when the muffler is bad. A rough idle or excessive smoke from the tailpipe can be a sign that the muffler needs to be repaired. Driving with a bad muffler can make for an uncomfortable experience, so getting it repaired quickly will not only save you money, but reduce aggravation as well.
black exhaust,rough idle, miss in engine,rough operation of vehicle lower performance,higher fuel consupmtion
The car will idle rough and hesitate during acceleration.
When was the last time you changed your O2 sensors? They are supposed to be changed about 60,000 miles. Could be responsible for rough idle and popping in the exhaust. Otherwise it is likely a vacuum hose that is leaking.
When the timing chain is bad on a 2002 Cavalier, the engine could have several symptoms. The engine could run rough, be hard to start, or not run at all.
The Ford Explorer may have an exhaust leak. An exhaust leak is loud and will lead to sluggish acceleration as well as a loud raspy sounding vehicle.
Check the O2 sensor located on the exhaust pipe on the passenger side. Could be giving the computer wrong information.
The vacuum lines for a 2000 Cavalier are located all over the engine bay and under the dash. A break in any line can cause rough running.
Inside the lower part of the engine. The pistons are connected to the crankshaft by way of rods. Here is a rough diagram.