I can't speak directly for a Toyota, but if you have a carberated system then you could be having problems with a leaking vacume hose or something in your EGR valve.
have they check the timing on it. sometimes when timing is off by a few degrees it would cause both rough idle and backfiring. also check for a dead cylinder.
A 1988 Toyota Corolla might run well one day and rough another day because of temperature changes that cause the vehicle to have leaks in the seals or gaskets. This might also be due to bad gasoline purchased the second day or even water in the gasoline. A clogged fuel filter might even cause this issue.
Yes. Otherwise,they would die if their heart stopped beating.
the circulatory system
Hey Andrea==There could be dozens of things to cause it. If it runs bad on wet days spray the dist cap inside and out and all of the plug wires with WD40. GoodluckJoe
It is possible. Replace the filter and see if the symptoms disappear.
my 1990 300zx is idling rough what could cause this?
the radiotor or the cams
There are several things that can cause your 1993 Nissan 300 to idle rough. The most common cause is dirty spark plugs. Bad spark plug wires can also cause the problem.
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.
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.
heating element stopped working
incomplete combustion of fuel
change the plugs and wires
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.
Stopped up fuel filter.
A shallow streambed that is rough and rock.