95 geo tracker starts great when really cold,but hard starting when warm.You have to floor accelerator to get it started.

Have you checked fuel pressure ?

maybe ur cadlatic coverter is going out u can take it to a muffler shop and some wont charge u to look at it . some times u can to if ur center floor board gets really hot

replace fuel filter

wont kick n passing gear

try a compression test. when cold.

It needs a fluid change,and filter,in the transmission,also,add a additive called LUBEGUARD from napa auto parts,when you ask for the additive,be sure to get the one for gm,this additive keeps the valve body slick,and moving,this is the problem,your filter,and ,or,the fluid is dirty,and causing hydraulic problems,and valves to stick in the valve body in the transmission.

see if your starter is loose then get back to me

timing belt lasts 100k and then slips.
loses power
or
bad MAF sensor.

bad fuel pressure due to bad pump or regulator on front of rail.

can be many many thing , but this is 3 reasons.

91 is 8valve TBI injection.
it is flooding.
the starting fluid is more combustible and starts a flooded motor.
kinda like adding dynamite to bbq lighter fluid.
hahah
ok,
try a tune up.
then try holding gas pedal to floor, this is super secret unflood mode and cuts fuel injection.

the issues why its flooding, not starting is normal for that condition.
so its:
1: bad need of tune up
and or
2: leaking injector.

the former you can figure out.
cap/wires/plugs /rotor, filters, there i said it.

or
this car has a viewable fuel injector
one an do 2 things with it.
key on five times , or 5 seconds on, not cranking
and other person looks down throttle body neck
yes, off comes the tube on top.
and makes sure the injectors dont dribble full time, key on.

or
the ECT is bad.

or dash pot is not opening at key on crank.

or
cold start, IAC is clogged.

complex it is,
it will take hard work to check everything.

http://carfix.stufftoread.com/
see flooding here.

how is the crank sensor on it is it loose