Golf A4 motor ignition failure

Good morning, I have a Golf A4 2000, in the morning late to light, sometimes in 2 or three attempts lights, but sometimes it makes explosions, since it turns on everything works normal, it does not lose strength, it accelerates perfectly, it does not register any fault, it does not turn on the check Engine, everything normal, the problem is when I turn off and I want to turn it on again, cough and turn on to the 2 attempt, if someone could help me. I replaced the pressure regulator of the injector rail and the gasoline pump, with original pieces

Hello, look to see the spark plugs, if they are very dirty or spent, also if the lamda is not good, the check is not always turned on. That he does not turn on the first one may be that he is drowned for not burning well, for example that he drips any injector or that the regulator is of greater pressure than he had ..

Thank you very much Ismael53, the regulator is the one that carries it, I bought it in the agency, it may be the Lamda Zonda, or do not think it can be the IAC valve, or maybe you are right with that of an injector is dripping, because when it turns it on it smells a lot of gasoline and that can be what you comment, and therefore the fuel gallery also emptied.

But if an injector dripped, you do not think that when I run it too, but as I said, nothing else encloses and everything normal, it has a lot of power, perfect acceleration, it accelerates it comes out skating, it does not lose strength

Hello, Jcim, if the Lambda has km, dirty or bad, uploads consumption as the first symptom. If one or some injectors drip them, they do it with the engine stopped with a ramp pressure, wetting the collector so when you start again, there is more gasoline than it should and ... in terms of the march it affects that it enriches the mixture slightly if the loss of tightness is not much