In my 97 Taurus i'm having a strange problem. Whenever starting "cold"
engine (in Florida so not really "cold" per se :-) I can put it into
reverse to back out of driveway or parking spot and whole car kind of
"shudders" or jerks. As far as I remember only when at idle speed, if
you give it some gas problem stops. Engine never has died or anything
but feels really strange. RPM's seem normal no sudden drop or surge.
Have replaced PCV, spark plugs & wires and cleaned the IAC valve as
suggested in other messages here. Also sometimes does this when coming
to stop shortly after starting. Never any problems once engine has
warmed up, idles fine, and never any problems shifting or anything
while in gear.
I have read about some problems with other fords and the torque
converter when in reverse and at low rpm's, but from what I have read
that is on a different model transmission and my problem is not every
time, just when first starting car.
Any suggestions what to check? I'm at a loss.