A fouled spark plug or a loose spark plug wire can cause a rough idle and a loss of horsepower. It can also be caused by a dirty air filter.
my 1990 300zx is idling rough what could cause this?
the radiotor or the cams
There are several things that can cause your 2004 Chevrolet Trailblazer to idle rough. The most common causes are a dirty fuel filter or a dirty air filter.
There are several things that can cause your 2002 Kia to idle rough. The most common cause will be bad spark plugs or a bad spark plug wire.
If an alternator is going bad it can cause a rough idle in a 1993 Subaru Legacy. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy.
change the plugs and wires
What can cause a 1195 Oldsmobile to idle rough?
I blown head gasket can cause an engine miss which one cause a rough idle.
Try cleaning the EGR valve.
The most common cause of a 1996 Ford Escort to idle rough is bad spark plugs or bad spark plug wires. A plugged air filter will also cause it to idle rough.
if you have a carborator, it may have to be adjusted
Not likely but possible. I would suspect a leaking vacuum hose.