Problems Start Seat Ibiza 1600 Gasolina 1998

Hello everyone. I have an Ibiza Gasolina 1600 AA from 1998 and it has never given me problems until a few months ago. Lately when I try to start the car, it does 2 things ... or start the first without any problem, or I give it to contact and start but go out approximately in 1 second. Sometimes I have to try up to 8 or 10 times until the engine does not go out. And sometimes I have not even got it on, so I have to give up and after a few days I give him the contact and start the first.
I do not understand much of mechanics but I do not know if it has to do with something of the pipettes of the spark plugs or some of the injectors ...
Let's see if someone can lend me a hand and give me some option.

Thank you very much in advance.

Edu

hello.
This fault that you make mension has a very wide field of possible causes that have to be ruled out in order to be able to achieve the solution as fast and sensillo as possible.
What I can advise you and according to my experience there are three possible systems that can cause you that fault.
1.- The fuel system; So you have to verify if the pump works correctly either electrically and mechanically, the fuel circuit to the injectors.
2.- The ignition system verifying if you have a spark on the ignition spark plugs if you have it discard it immediately.
3.- And finally some crankshaft or camshaft axis position sensor if wears it.

These are the only normal alternatives if the engine does not start, obviously if you have not intervened any other system either that of distribution or the order of ignition of the engine.
To be able to give you more information, verify these systems and you can give me more details of the condition of your car.
luck...

Well it is my first search here and I think I can help ...
that happened to me, try the spare key since it can be (in my case it was) the key of the key. Official how and to code it.