Engine cuts off after several minutes despite enough fuel, new spark plugs and no physical indication of overheating or engine wear.

This issue could be caused by several different factors, some of which include:

1. Fuel delivery issue: The engine may not be getting enough fuel, which could be caused by a clogged fuel filter, a faulty fuel pump, or a malfunctioning fuel pressure regulator.
2. Ignition system issue: The engine may not be getting enough spark, which could be caused by a faulty ignition coil, a bad spark plug, or a problem with the distributor.
3. Engine overheating: If the engine overheats, it may cause the engine to stall and not restart.
4. Vacuum leak: A vacuum leak in the engine could cause the engine to stall, especially at idle.
5. Mass air flow sensor: A faulty mass air flow sensor can cause the engine to stall.

You may need to diagnose the issue further with the help of a mechanic or by using a diagnostic tool.

When problem is ongoing, if it cranks good but won't start, have a helper crank it while you check for spark at the plugs-- proper fuel pressure and fuel injector, where applicable. If engine is hot, wear gloves, that's what I do. If your missing everything, have to check pickup soil and ignition module in distributor. If you narrow it down to one system, then you can concentrate on that system, fuel--spark--whatever.

Oil on a spark plug indicates either worn valve guides or worn compression rings. It is also remotely possible that the head gasket is letting oil get in if the engine was severely overheated and warped the head

Try several things...

Fuel injector cleaner
New fuel filters
Check for vacuum leaks
New spark plugs and wires

The most common problem for engines not starting could be a weak battery. Is your battery fully charged/not old? All batteries are rated for a certain lifespan, varying from three to five years. If it's been past that since the battery was replaced, it could be that your battery isn't holding enough charge anymore. You could check this by jumpstarting the car. If your car starts while connected to somebody else's battery, then you know battery isn't providing quite enough power.

If your engine is getting enough power from the battery though, it's possible that it's not sparking correctly. When was the last time the spark plugs and wires were replaced? If it's been more than two or three years, they can begin to grow faulty. Spark plugs get replaced when you bring your car in for a tune-up.

Otherwise, it could be that the engine isn't receiving enough air, or enough fuel. If the air filter is extremely dirty and clogged, it's possible that there's not enough air reaching the engine. But for that to happen, the air filter must be really quite dirty. Has the air filter been replaced lately? For most cars replacing an air filter is really easy to do, it generally only takes a screwdriver, five or ten minutes, and $15 for a new filter.

The other possibility is a bad fuel pump, which makes it hard for the car to deliver fuel from the tank to the engine. Since your car is a 1994, it's possible that the fuel pump has been growing faulty. I had a 1997 vehicle with a starting problem where getting a new fuel pump solved the problem. If you take it into a shop to replace the fuel pump, make sure they change the fuel filter too.

It's possible, though I'd say less likely, that your starter is getting old, and that it's not cranking as well as it used to. If it's not cranking fast enough, the engine won't catch and start.

Starting problems are always annoying and may be caused by different problems. One unusual one I've encountered is that the keyhole was wearing out. You start a car by inserting and turning the key, and when you release the key the car is supposed to keep running, but in this case, if the key was released to far by a millimeter or two, the engine died. The keyhole was wearing out. Who knows? Perhaps you might solve your problem just by fiddling with the key a little bit. Remove it and then reinsert it several times and try again.

Several symptoms.
1. Engine light could come on because of a lean condition.
2. Hesitation
3. Poor mileage.
4. Burnt spark plugs, white or cream colored.
5. Overheating.
6. Could cause a no start condition if it is bad enough.

Tune up, coils ,wires.

For something like this it could be a number of differnet things. I suggest that the next time your vehicle cuts out on you check for sufficent ignition spark. you can do this by removing a spark plug wire from a spark plug and holding it close to a ground on the engine (or if your brave enough you can grab it lol). and if you do not have spark then i would suggest to replace the ignition coil. if you do have spark then i would check for proper fuel pressure.

hey they all do, eventually and for sure never doing tune-ups.
ever get one in the last decade, no >? wow.
then posting with no engine stated, and is and ENGINE problem
and no country stated,
we have (USA) 3 engines, other countries, up to 7 offered and diesels.

truth is it can be 50 reasons to stall,
that shop can not fix cars that are not broken, !! unless SUPER LUCKY.
they scan it and see nada. because its long gone the cause.

it's called a stall.
and stalls are simple in physics, or in theory but have 50 causes, in parts causes, a and about 1 to 10 tests to find.
there is the truth for yah.
cause 1 is not it, lost 12vdc to EFI system.
cause 2, can you save the stall with fast right foot.?

you waited 5 minute to try again, why?
most do it in 1second to avoid getting rear ended.... wow.
that was brave.
if it starts right back up. it can be vast numbers of things.
physics,
1: bad engine, (say a valve stuck open and stalled)
2: bad spark, say not getting a tuneup it 17 years. wow....
3: bad fueling, say bad gas or leaking injectors or dead.
now the mid size list , tests.
say you have tools and can use them,, many guys can.
for sure old guys.. who did for 60 long years.

tests and inspections etc.:
compression ok, at spec, (a tool)
spark plugs new if gas engine.
no engine stated but bad cops. J20 or H engines have them.
or bad boots on said cops none last 17 years, NONE.
bad filters, air and fuel
bad fuel, old fuel or water contaminated. might be gone now....
injector tests, pressure, and leakdown tests, and injector balance testing.


Or just want a guess.
sure
never tuned up ever
never once did the 60,000 mile repeating service points.
at the least.
.or EGR stuck open and stalled and will repeat.

the key factor was, preventing the stall with a fast right foot
you didnt so we can never know whats cause.
this adds air, doing that, and if it recovers easy.
it is a good clue.