Hard to say for sure without being
there but could be a few
possibilities..could be your
iacv(idle air control valve)May be a
dumb question but are you sure
you have the spark plug wires in
the correct order.?? That can
cause misfiring and horrible idling
n definitely cause your car to run
like complete sh*t.. then again
could be fuel pressure issue..I'm
sorry for probably confusing you
but easiest way is so start
checking main components..
engine needs air,fuel,fire so air
could definitely be iacv, fuel could
be fuel pump losing pressure or
failing n fire could be something
as dumb as wrong firing order or
faulty distributor... Are you able to
plug into your obd2 port and check
for any ecu codes.? If not you may
want to stop somewhere like
AutoZone, I BELIEVE they will scan
for codes for free. That is the
fastest n easiest way to find the
issue without throwing money into
pointless parts.