Symptoms that might indicate such an engine-related case of the shakes include the following:
- Shudder or jerking occurs during acceleration
- Staccato shaking, as if over a highway "rumble strip," within a specific speed range
- Car starts and drives fine for a while, but later begins to shake
These
symptoms could be signaling that it's time for a new set of spark
plugs. If the plugs are fine, it could be that the spark plug wires need
to be checked (are they connected in the proper order?) or replacing.
Lastly,
a dirty air filter or clogged fuel filter can starve the engine of
needed oxygen or fuel, respectively. So be sure to replace them at the
manufacturer's recommended intervals.
Our
vehicles are full of reciprocating, rotating parts that have to fall
within certain measurements, or tolerances, in order to perform
properly.
If
an axle gets bent -- which is actually quite easy to do in a collision
or other mishap -- it will create a jostle of a ride afterward. With
this problem, the vibrating often picks up in intensity the faster you
drive.
A
related problem would be that the driveshaft also needs inspection.
This rapidly spinning part transfers engine power to the rear axles and
wheels in rear-wheel drive vehicles. If it's bent, shaking may result.
Worn-out
constant velocity (CV) joints fall under the same category. If the
"boots" -- those rubber, accordion-like coverings around the ends of the
drive axles -- are intact, clamps are secure, and no lubricant is
seeping out, chances are they're not the problem. But if the boots are
torn, that means dirt and dust and road filth is getting in and damaging
the joints. For front-wheel drive cars, toasted CV joints mean you'll
be buying new drive axles, too.
- Courtesy of How Stuff Works
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