In park when started it idles real high SOMETIMES or real low SOMETIMES.
Also when in park and it will go from 2000 RPM's and then it drops when it
is put into gear SOMETIMES and then it also goes from 1000 to 2000 rpm's
back and forth for about 30 seconds sometimes it dies before it is in gear
and sometimes if I am stopped it will die and if it does not die when I am
at a stop when I try to go it is very delayed, it acts like it's got bad
fuel or the fuel filter is clogged (1st part I replaced a week ago). So
there is my dilema,and yes I have had it in the Isuzu repair shop 2
different times and they claim that there is nothing wrong with it because
it is not consistent with the malfunctions???? Can anyone give me some
advice I absolutely love it and it is the perfect Soccer Mom/Creek-4X4 for
me?

Vacuum leak? I had similar symptoms when intake manifold gasket was failing

Peter