325i e36 bmw 1994 model it didn't have spark I have changed crank sensor and fuel pump now I do have spark and the car still doesn't want to start is back firing.

SOURCE: 1994 pontiac bonneville fires up but stalls imediatly

WOW a 94 with 46K on it thats rare. Your computer may be bad it sends the pulse to the injector.

SOURCE: Change spark plugs and now car wont start.....1994 ford tarus

Do you have the "firing order" correct? In other words, is each spark plug wire going to the same cylinder it was on before you changed the plugs? If you have done nothing else but changed the plugs then this is the most likely problem.
If when you try to start the car it backfires through the exhaust or backfires through the intake. Then this " IS" the problem. Good luck.

SOURCE: Car won`t start,stalled and didn`t start back.

checkout the crank sensor and the engine timing also checkout these websites www.autozone.com and www.alldatadiy.com

SOURCE: Car will not start.Engine turns over but spark plugs willnot fire

I would say replace ignition coil, that might me the problem, otherwise it can be the ecu, which might have some electrical problems not allowing the car to stay running. Good luck.

SOURCE: I have 95 ford contour cant get any spark. Changed

TPS sensor
Fuel pump relay
a new fuel filter if the old one is plugged up solid
Computer
By chance did you check the computer for any fault codes? If any stored it will tell you what the problem maybe