2002 Taurus SEL 3.0L Duratec engine, ( 93,000 KMS)
Have annoying engine miss at idle, most noticeable when in drive, stopped
at traffic lights. Service Engine Light did not illuminate.
Miss is that noticeable that it is felt throught car by all occupants.
Ford delaer ran diagnostics and road test, no faults recorded. They recommended
replacing plugs / fuel and air filters, done by Ford dealer, problem still exists.
Ford dealer suggested wait till Servicre engine light comes on, and then return
to garage. Several thousand KMS since, and still no light illuminating.
Acceleration to highway speeds do not feel smooth.
In recent days I have noticed that when heater/AC is turned off, miss is
gone, turn on heater or AC
and engine begins to miss.
When the heater is turned on, you can hear a heater or ac
vent door closing
or opening, is the heater and ac
system, and within a minute engine begins to
Seems very strange that turning the heater or ac
system on, could cause this miss.
I have already spent $600.00 for tune up / diagnostics and no closer to finding
problem, do not want to continue troubleshooting at these costs.
Any suggestions or ideas.