I have a 1995 900S conv., 2.3l that is hesitating under wide open throttle,
even at low (2200) RPM.  It will accelerate for about 3 seconds, then buck
sharply.  The recent services performed by the dealer for the previous owner
to try to cure the problem were: new temp. sensor, new fuel pump.  The
distributor is new as well as the wires and plugs.  I have replaced the
thermostat (stuck open) and a few vacuum hoses that were cracked.  The
rubber intake piece that attaches to the airflow meter and the intake is in
good shape.  Any ideas as to what I should look at next?  The check engine
light came on the last time it acted up, cutting off at idle.  Thanks for
any help.