Bobs down when I drive up hills like one of the cilinders is not firing right . now its stalling and when idling it surgining

lots of causes even 100 possible (under bad engine list)
bad engine, bad spark or bad fueling << in that order.
or lack of air, idle ,IAC valve stuck closed or just dirty, clean it.
bad spark," 28 year old spark parts have no chance.
clogged injectors fully or in part, x cylinders.or leaking.
bad or old bad fuel, car parked for ages? unused, is bad fuel
not told what car does good?
full engine power up hill? besides stalls how does it drive???????
check engine lamp off? driving.?
can you prevent the stall easy with a fast right foot (gas/pedal)
if yes and engine seems smooth, can be IAC bad?
or EGR sticking open makes all cars stall. at idle.
at idle EGR is not enable but if stuck open all this fails

IAC = IDLE AIR CONTROL, (VALVE)

MOVE THE CAR FAR AWAY FROM HOUSES AND KIDS AND PEOPLE NOW. PRONTO

NO YEAR CAR TOLD OR COUNTRY . 2.7L OKAY.
WRECKING THE CANISTER LIKE THAT IS SUPER BAD.
THAT CAUSES HUGE GAS TANK PRESSURES FOR GO CRAZY HIGH. THE CAR IS DANGER TO YOU AND ALL AROUND YOU
NOW. IT WILL CATCH FIRE, AND IT WILL NOT BE A HAPPY DAY.
GLAD I AM FAR FROM YOU.

RAW LIQUID FUEL COMES TO THE CANISTER ONLY 2 WAYS.
THE BAD BOY THAT DID THAT ACT
OR OVERFILLING THE GAS TANK.
OR BOTH, I BET BOTH. (OR HOSE ON THE TANK BOYBOY WRECKED THOSE TOO)
FIND A REAL SHOP TO FIX ALL THAT OR HAVE BAD FIRE.
IF SOMEONE DRIPS A CIG NEAR YOUR CAR IT WILL NOT BE FUN. EVER.
EVAP 101
Nomally the tank is never full, ever. by design at the filler the station pump clicks off at full , do not overfill any cars tank.
at that moment the tank has and air space on top, and only fumes are there, not gas.
these fumes are sent to a check valve (evap) to the canistor
and it collects only fumes never ever gas,raw, and if did the raw gas wrecks the canister carbon brick inside.
when you run the engine the engine vacuum sucks the fumes out of Mr. canister and it is now fresh and clean, and repeats.

your car is now HACKED and unSAFE.
find a shop to UN HACK it.

possible cat converter

you don't say if its petrol or diesel you could try changing fuel filters d ifficult siarting and running problems are usually fuel or electrical but try filters first

hot engine or cold, or both? 180F+ is hot.
Shuts off, idling or on the fly, say at 30mph right foot down it dies?
just clue here...
engine stalls. is complex. but in the macro its below, using tools finds the reason,, but you never said did it restart easy./??????
1: lost of engine compression hot engine, (or overheated)
2: lost 12vdc electric power at stall (caused it) dash goes dead. ?
3: lost spark, test spark at the failure point. if dead trouble shoot speak.
4 bad fueling, too lean (say the fuel pump dies) or too rich.
too rich causes wet spark plug tips. (lots of causes )
5: stalls due to idle RPM too low, below 800 is too low.
too low idle rpm is caused by many things, but top 2 are.
A: EGR stuck wide open, clean it, as the books shows at 60k miles
B: ISC stuck closed. (same deal clean it)

now repost and say when it stalled,
at a read light or flying up a hill wot, wot= wide open throttle.
and when it dies, is the restart easy or hard.

two things from what I read is the tps sensor and iac valve

do the procedure below, should help the problem.
I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

check the fuel regulator ,parking up hill sounds like the fuel is leaking off pressure and going back to tank,when you park down hill,gravity is keeping the fuel pushed in the lines

tune up.plugged injecters,bad fuel filter.engine wore,could be many things.

actually driving with the check engine light flashing will damage your catailic on the exaust seems to be than you have a misfire,
most of the times the coil have the number of what cilinder the cable goes to, pay attention to that or get a book for your car at any autoparts and you'll find the inf.