I HAVE A 1995 NISSIAN ALTIMA AND IN THE MORNING IT DONT START AND WHEN IT DOES IT BLOWS OUT BLACK SMOKE.. ONCE IT IS STARTED IT RUNS FIND I FIXED A LOT OF STUFF BUT IT IS STILL NOT THE PROBLEM I NEED SOME HELP PLEASE

fuel injectors or glow plugs

try to go to autozone (or other auto parts store) for a free engine diagnostic. most likely the crankshaft position sensor is bad.

take a volt meter and set is to the DC mode. Take the probes and attach them to the battery. Red on Red (+) and black on black (-) If you receive 13.5 volts you have a good altenator it seems but wait.. Reverse the probes by lack on red and red on black. If you get a reading of any voltage the diode is bad that will prevent the battery of receiving any kind of a charge.

ALL OF THIS TESTING IS DONE WHILE THE ENGINE IS RUNNING

gosh, nissan spent 6 million dollars replacing faulty/leaking fuel injectors around that time ...maybe its worth a trip down to the dealer and do a campaign/recall search on your car...might be a car that was covered under that campaign and you might get injectors covered

Check for excesssive drag on the clutch (specially if hydraulic clutch actuator)

adjust the idling, if too low then it can't sustain the power needed to keep the engine running when it engages.

Your dad must have had his smarty pants on, the problem is likely the brake light switch, but I would get under there with a test light and a wiring diagram, make sure the switch has power before you replace it.

If it's the org. engine it will has over 150,000 miles on it.
It's normal to has the valve stem seal/oil seal on the head to leak oil into the cyclinder.
The smoke you see is the motor oil drop from the seals.
It land on the top of the cyclinders and it create black smoke at start up.

The inexpensive fix is to start using high mileage oil with seal conditioner.
This will help soften the rubber seals and help reduce internal oil leak.

The correct fix is to wait until it's time for a head gasket replacement and let the professional service the head.

Complete head service is the only method to stop this internal oil drip problem.

try replaceing the oxygen sensor

Im pretty sure you have check the fuel/air mixture control.. Its just like my problem and its running fine right now..Remove the fuel/air mixture control and spray a bit of carb/injection cleaner ot it.Then close the mixture all the way and open it 1 1/2 turn...and start the engine.......
or check the idler vacuum sensor if its working this part is controlling the mixture during idle rpm