From your description I would guess that your car has a bad fuel pressure regulator. To check the fuel pressure regulator remove the vacuum connector from the throttle body. If gasoline comes out of a vacuum line the diaphragm has ruptured allowing excess gasoline to enter the intake through the vacuum line.
If that is the case you will need to replace the fuel pressure regulator.
Start with replacing the fuel filter, it may be plugged.
It sounds as if the fuel filter is clogged and not getting enough fuel to the injectors.
There are multiple things that could cause this, your best bet it to take it to a mechanic and let them check it out.
not downshifting.
TCC Solenoid.
Could be a fuel pump going bad or a clogged fuel filter,
They start to sputter,stall and stop running.
It sounds like your engine is not getting enough fuel, try checking the fuel filter.
I had a 1987 Chevy Celebrity that would start and then immediately die. It turned out to be bad fuel injectors. I replaced three fuel injectors and the problem has not returned.
coz you shud of gone to specsavers
FUEL PUMP IS YOUR PROBLEM {why do you think its the fuel pump?}
how to in stall a Quarter Window in a 98 Chevy blazer