1996 525i been stood for 3 months new batt and plugs turns over sparks but wont fire fuel on plugs any help would be appreciated

Have you checked your compression? An engine needs 3 things to run, air/fuel, spark, & compression happening at the correct time.

See diagram

If the trucks turns over and does not seem like the battery is dead I would assume it is spark or fuel. Check spark plugs to make sure they spark. Pull one plug at a time hold it against side of engine and have someone turn the truck over for you. You should see bright spark from all spark plugs. If you do see spark then check your Fuel Pump to make sure it is getting power and is opperating correctly also check your fuel filter to make sure it is not plugged. Good luck, Hope this helps.

Check your Cam,MAP,MAF sensors.

Have you check your fuel pressure?

Has this been taken care of?

did you drain the gas old fuel turn into like gel and can clog injectors and run rough it may take a while and some fuel flush to have it running good again

I had a problem like this on a 1997 VW Jetta 2.0L. I suggest you obtain a multimeter, a gas pressure gauge, and a used injector from a junk yard. You need to find if the car has spark if it is getting gas and if the injector is firing. Plug a used spark plug into say # 4 spark plug wire and ground end against the manifold or other ground. Have someone crank the engine and see if there is spark. If there is spark then disconnect the electrical connector and plug in the used injector and hold in your hand. Have someone crank the engine and if it clicks as the engine revolves the injector is firing. Now if you have spark and an injector that clicks then put the pressure gauge in the upper line going to the injector manifold. Use a T so that the fuel can still flow into the manifold. If these three things check out. You need to also verify the engine is timed correctly and the timing belt did not slip a few teeth. I had a problem with my crankshaft sensor. I bought a new one and although I was getting about a .3 volt ac signal, I still had no spark at spark plugs. I wound up getting another new crankshaft sensor and read 3 volts ac from the new sensor. I then had good spark Hope this helps

The cap should be marked for number 1. The distributor turns clockwise. The firing order is 1-3-4-2.

clogged injectors you need to put cleaner in the fuel to help get dirt and grit out of them some times (every 3 months).
I am assuming you are saying it will turn over but not fire and run when cold?