Town Car V8-4.6L SOHC VIN W (1999)
the source of the vibration.
NOTE: The following is a list of common vehicle concerns that have been misdiagnosed as torque converter clutch shudder.
a. spark plugs - check for cracks, high resistance or broken insulators
b. plug wires
c. fuel injector - filter may be plugged
d. fuel contamination - poor engine performance
e. EGR valve - valve may let in too much exhaust gas and cause engine to run lean
f.
vacuum leak - engine will not get proper air/fuel mixture
g. MAP/MAF sensor - improper air/fuel mixture
h. H02S sensor - too rich/lean air/fuel mixture
i.
fuel pressure - may be too low
j.
engine mounts -loose/damaged mounts can cause vibration concerns
k. axle joints - check for vibration