A rough idle on 1990 Lincoln Town Car with a 5 liter engine can be caused by the fuel injectors. The least expensive way to test this is to purchase a fuel additive designed to clean injectors. If the problem persists a mechanic should be consulted.
my 1990 300zx is idling rough what could cause this?
Check/ replace the TPS if the idle is up and down.
I have 200,+ miles on the car. I change the plugs and wires yet it runs rough at idle and runs smooth at crusing speed. What can i do?
Your 2000 4.8 liter Sierra might run rough at an idle because of clogged fuel injectors or a clogged fuel filter. You might also have gotten water in the gasoline.
Check your vacuum hose.
why does my vr commodore idle rough when at complete stop
Why does my 2001 kia sportage idle rough?
rough idle smell gas
I have 1998 a Lincoln town car with the same problem.. It idles rough when you start, then smooths out once it warms up and you give it gas. From what I am reading its either an oxygen sensor or you have vacume leak in one of your hoses by the manifold.
Sounds like your catalytic converter is getting plugged. The Rough idleing could also be apart of the IAC (Idle Air Control valve) being gunked up. Check the cats first, then if it continues to idle rough, take the IAC out and clean it with throttle body cleaner.
try using zmax i had the same thing on a car i had and it worked for me
When the idle goes rough, you must idle the plugs. Else the car plugs roughly.