My mustang will crank a little long sometimes. Some will turn right over then almost die. Once it's running it's ok. Also it just doesn't always have as quick acceleration as it should, no misfire or CEL. Any thoughts on what it might be?

 

the battery might be going, have the batter checked out at autozone, you may need to replace it, a fresh battery will start the engine in a second

 

Have you changed the fuel filter? I would start there

 

I have changed the fuel filter. Battery tested fine

 

Fuel pump.

 

Yea probably fuel pump. Only other one if seen similar was an injector stuck open and letting fuel through. Drops fuel pressure and floods a cylinder

 

I've got good fuel pressure. The starting issue happens at random. Not after sitting. Is there anyone that has had this happen to them? Maybe you've found a solution. I don't have enough money to guess

 

Hose in the tank connected to the fuel pump. It has a small hole in it that leaks the pressure out while it sits.

Try this. Before you start it cycle the key on and off 3 times for 10 seconds apiece.

Bet it start easy after you do that.

 

Yeah that's backwards from the hot seize fuel pump failure....you could also check fuel pressure when the car has sat overnight if you haven't already...if its good that would rule out a system leak. It's weird though cause this reeks of a fuel delivery problem...its is possible the pump is intermittently failing which has been known to happen.

 

It could be but he said once its going it doesn't die. I'm almoast certain its a hose leak in the tank. Seen it so many times.