Engine not firing first time

Deville 92 old. lots to find bad that old. !
here it is, ID #2 below
you were told wrong, the reg is inside the ALT, actual.
the internet lied again.; 1/2 the time, asking 8year kid same.

the top parts sellers online,shows, no REG outside, so strike 2 on reg outside.

learn to keep that old (how old is it?) battery charged fully until car runs perfectly. or it can take 1/2 to jump start it or worse. dead batteries do not start engines and overload the poor donor cars electrics, doing so.(jumped)

once battery is new, or charged or load tested in a real shop
start the engine, see if GEN/CHARGE lamp goes out.? on dash.
if not alt is bad. wow no fuse then, scary then. lots of car fires.
or use voltmeter idling, at bat terms. 13,to 15vdc good below ALt is dead
140amp alt here.

https://www.rockauto.com/en/catalog/cadillac,1992,deville,4.9l+v8,1025738,electrical,alternator+/+generator,2412

1. Test battery (Should read 12.5-13v). If not charge or get tested, may need replacement.
2. If battery is good, take a pair of jumper cables, connect Black lead between (-) Negative side and the the block of the engine (often there are metal brackets, etc they make good connection points). Then connect the Red lead, between the the (+) Positive side of battery and JUST TAP the end to battery connection on the starter solenoid to see if engine turns over. CAUTION: Engine vehicle is in Park, parking brake set, and will not move before attempting this procedure.
2a. If this does not turn over engine, remove starter and have it tested at an auto parts store.
2b. If it does turn over there are two paths to further troubleshoot. (1) check battery cables. One way to do this is to turn the ignition key on, and attempt to start the car by the method described in 2.. BUT EXTRA CAUTION: Engine vehicle is in Park, parking brake set, and will not move before attempting this procedure. (2) if the truck did not start in (1), then you will have to wire trace the starting circuit checking all fuses, connections, etc. (local auto parts stores or often local library, carry Haynes Manuals that have wiring diagrams int the back)

Best of luck resolving this problem.

run the fault codes and look for faulty cam/ crank position sensor as this is indicated by the backfire/hard start and lower idle RPM. Check that battery terminals are clean and tight..

check fuel pressure as it may be leaking back over night
injectors are the main problem in reported misfires
use a quality injector in the fuel to see it that improves the problem

it is poss not related the normal problem with that engine and the symptom you say. is caused by the ignition module inside the distributor

I had a similar problem a few months ago. Ready to get major engine work done, got fire, timing was right, getting gas.....
An experienced mechanic asked where the car had been parked and how long. I had parked it in grass, over a wet spot. The battery was dead too. He told me to park it over a warm spot for a few days and try a new battery. Did that, with the hood open, replaced the battery, and it fired right up. Something about being too damp and/or the voltage in the battery was too weak.. All I know is it worked, and I drive it every day and don't park in wet grassy spots.

Is your car parked outside the garage?If yes,try park inside and see any difference.

If you have a 4.3 youll need 54psi-60psi the common vehicle failure is the coil if the spark is goin there youll have to determine how good is the spark a weak coil can give it a hard time to start, Open the distributor cap remove the rotor is it rusted. there is a reluctor there they tend to move out of postion and fire the plus at the wrong time. put it all together.loosen the distributor now have someone crank the car as you turn the distributor does it want to catch if yes replace the whole distributor you may not be able to by just a reluctor any more. plus it cheaper this way and faster

There are several things that few people know about starting cars in cold weather. 1. Check your battery to make sure it is not rusted, leaking, and has a charge 2. Jump start your battery with another car, even if you believe the battery is good, this often times will still start your car. 3. If your engine is cold, and you have an older car, ensure to get your fuel lines to the engine flushed or have fuel injection service performed 4. The engine tends to warp the same way wood does during the extreme cold, do not be afraid to continue trying to warm up the engine by constant cranks with it is cold out. Your not going to hurt the car, the worse that could happen is too much fuel will enter the carborator and cause flooding in the system to occur. Wait 20 minutes if this happens and start to crank again 5. Bad spark plugs are a major reason why many cars take a very long time to start 6. Please have your spark plugs removed and exchanged for new ones. Over time, spark plugs become fowled and prevent the car from starting even thou you hear cranking!!!

hi... there are several reasons for this to happen.

1.Battery terminals loose or corroded.
2. Ignition components damp or damaged
3. Broken, loose or disconnected wiring in the ignition circuit.
4. Worn, faulty or incorrectly gapped spark plugs.
5. fuel injection system fault.
6. Major mechanical fault, e.g camshft drive.

Lots of questions first.

Does the starter motor engage when turning the key?????
Is the air filter in good condition?????
Do you have an immobiliser on the car???

Advice! albeit rather harsh! when attempting to start the car give the startermotor a good stern whack with a hammer! some times the starter jams and this and cause the aforementioned problem.

Hope this helps