When starting in the morning, you have to turn the key and let it sit for about 10 or 15 seconds before you start it or else it will start and then soon die. What would be causing this? 1990 Volvo 240 DL

Security. Turn the key to run. Let it sit for ten minutes, off for thirty seconds. Then try to start. Do this three times for a relearn. Don't try to start.

A common cause is a faulty check valve in the pump. The check valve prevents fuel pressure from draining back into the tank. The pump gets power from the relay for only 3 seconds during crank which would not be enough if the fuel line has zero pressure. You could cycle the key on and off a few times and probably start it quicker if that is the problem.
Have the fuel pressure checked after sitting overnight.

You have 2 issue going on. Its not seeing a valid key,and it is starting with the remote.Your remote entry key did it happen to get wet? Or moisture get in? Lock the vehicle up using the key. enter the vehicle using the key fob.After the vehicle unlocks you have 60 seconds to enter the vehicle insert the key in the ignition start it up.Your remote start up is out of step.

try if this works\improves your situation;

turn the key to ON but don't crank, let it sit for 2 seconds. Do this 2-3 times, then put it in the ON position, wait 2 seconds then crank. As for what it is, could be spark plugs, fuel pump\line issue, etc..

this could be a few things fuel pump getting weak or your alarm could of activated itself and it disables the fuel to the engine, I would try reseting the built in alarm system. first put the key in the ignition and turn on till all the lights come on and let it sit 10 minutes with the key on, then after the 10 minutes is over turn the key to the off position and wait 3 seconds and then try to start. if it starts which is possible because grand ams and olds aleros are bad for the security system locking up by them self. Hope this helps.

you have a small power(ICM)_ module that is heating up. it's square with 3 promgs 2 on 1 side 1 on the other. I believe it's on the back side of the distributor. 2 screws hold it on/ and the neutral saftey could be giving you problems. it's 1 or the other.

ok here you go
make sure the battery is fully charged befor starting
turn ignition to run
attempt to start once then release the key in the run position
let vehicle sit with the key on for ten minutes
the security light should turn off
turn igniton switch off
wait 5 seconds
turn key to run position
let vehicle sit for 10 minutes
turn key off
wait 5 seconds
turn key to run position
let vehicle sit for ten minutes
turn key off
wait more than 6 seconds
and start engine

There could be a few things causing this. When the car finally starts, is there any smoke coming out the exhaust pipe? White smoke would mean your headgasket is leaking and is letting coolant into the engine, then it is burned along with the fuel. Does the car run hot? Meaning has it ever overheated? Back to the smoke, if its black, your oil is getting in and is burning.

Now, the reason why it would be hard for a car to start, could be, a leaking headgasket, flooding the car while the car is sitting.

And yes, the car would be able to crank, but just wont start, for a while...because it has to get rid of all that fluid that has leaked into the engine while sitting at night.

Another thing you could look at, is your fuel pump, is it supplying a sufficient amount of pressure? If it isnt, it will take a while for it to pressurize and deliver fuel into the engine. You can check the fuel pump yourself by renting a fuel pump pressure tool from stores like autozone, kragen and more.

Your gas cap on tightly?

Good luck with your problem.

Sounds like your spark plugs or plug wires might be at fault. What kind of sound does it make when it doesn't start up?