The car runs fine if I use it daily..if it sits for several days it starts ok, but runs rough, backfires, and smells like rotten eggs. If I drive it for several miles it will clear up and run good until it sits for several days again. The check engine light does not come on when it's running rough. Any ideas?
Hi Jhlightcap.
The Common Problem: Rough Running Engine
A properly-operating engine should run smoothly and without excess noise. If your engine starts operating in a manner that gives you the perception of "running rough", it is likely due to a handful of common causes. A mechanic would investigate these common causes first in order to rule out a simple explanation for the engine's unsatisfactory operation.
The common causes for rough running in an engine are:
Rough Running Engine James on Engines 2
SOURCE: Car runs rough and misfires
if u checked the codes and it showed that a o2 sensor is bad make sure ur on the rite one as in {sensor 1 bank1 or sensor1 bank 2} when u change a sensor always make sure u got the rite one.
hope this helps
SOURCE: Car won't run after rain or after it sits for a couple days
you need a tune up new plugs wires and cap an rotor
SOURCE: 2003 Ford Taurus cylinder misfire #1 and #5 code
sounds like your wires are switched around. have replaced the plugs lately
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