88 Camry was driving fine then nothing

Year make and model might help a bit. Things to check for are starter, alarm, spark, fuel. Does it make any noise while cranking, does it crank. The more info you supply the better the answer

Unless you really know what you are doing it would be well advised to take car to transmission specialist. U have a sick puppy in urgent need of medical care.

try starting the car and while running disconnect the negative battery cable,if the car still runs turn on the head lights,if the car dies the alternator is weak. I think its weak and can charge the battery as long as the lights are off,but cant keep up when theyare on. so if drive most of the time in the day time you are ok as long as you dont have to start the car too many times. when you drive with the lights on and the engine slows to an idle like when you park the car dies. make sense?

Have the dealership reprogram the computer,it has lost it` s memory from disconnecting the battery.

Petrol pump or filter, Say Please ......

Check fusable links

Take the car to Sears or another large auto parts store and have them check the condition of the battery and alt. They do the check for free!
Watch what they do and have them explain.

maybe it is not completely in park ?? Try starting it in neutral.

Your Ignition Relay Is Faulty.
It is located in the Underhood Fusebox.
Consult your manual or the box lid for the exact location.
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Had the same problem with an '88 Camry. Replaced the battery, distributor, and starter, but it didn't fix the problem. Then, a few years later, when the battery was getting old and tired, I replaced it with a more expensive _heavy-duty_ battery. That helped quite a bit. It didn't totally fix the problem, but made it a lot less frequent.

A mechanic I trust told me that non-OEM replacement rebuilt starters pretty much all have substandard wiring, with bad spots in the windings. A heavy-duty battery maybe cranks out enough extra amps to mostly compensate for this.