My astra does not start

Good morning my name is Juan Carlos and it is an Astra 2004 Automatic 2.0.
Previous days the air duct that comes from the filter was replaced and that goes to the acceleration body, it was broken, and the entrance was cleaned. It also took time but as the second or third attempt achieved, sometimes it helped him with the accelerator. It is also true that the gasoline pump was activated when the switch opened, sometimes not. But normally it is always at first.
The strange thing is that yesterday he started at first and today I did not get it, after trying more than 20 times I left it.
The symptoms are: the pump if it works but once the open switch does not do it to the second but can vary, the car as it wants to turn on but fails to get it, drummer well, march well. Another thing is that once the car is hot, it starts the llavazo, always batallo when it is cold.
I hope they could help me and thanks for your time

At cold starting it can be the problem of the Tenperature sensor, it happens if you want to rule out the pump put a direct cable to try to see what happens. Can you drown through a fuel excess one that part do you feel a lot of smell of gasoline?

Hello.
I could tell you an experience that I had with an Astra 1.4.
I had a symptom more than you have. In occasion and on occasions not, other times it splits to the first and if then you stop it no longer. Well, I can recommend that the fault can be the fuel pump
because what I did when the engine does not split, directly successful the fuel pump with the battery voltage and the pump did not work. So we change it and never fail.
luck...