Clean a throttle body
1 of 3
Disconnect the air duct
air duct from
the throttle body.
mark any electrical
connectors or vacuum
2 of 3
Spray on a cleaner
and rotate the
Spray throttle body
cleaner around the
inside of the throttle
3 of 3
Dry off the solvent
into the throttle
body to dry the
attach the vacuum
lines and electrical
If your car runs rough when idling, the cause just might be a dirty throttle body.
The throttle body controls the amount of air the engine takes in, and when it gets
dirty, the engine can't idle smoothly. So before you take the car into the shop,
consider taking 10 minutes and cleaning it yourself with a spray can of throttle
body cleaner and paper towels. You just might save a bunch of money and there's
a good chance you'll cure the problem.
Here's how the throttle body gets dirty. When an engine shuts down, hot
exhaust gases and unburned fuel float to the top of the engine. As the vapors bake
from the engine heat, they form black sooty carbon deposits inside the throttle
Follow the plastic duct from the air filter housing up to the throttle body.
Remove the duct and locate the throttle cables and rotating mechanism. Rotate
the throttle mechanism and spray the cleaning solvent around the inside of the
throttle body. Give
it a moment to
work and then
wipe out the crud.