Voyager engine 3.3 lts national takes to start

B. day to all.
I got a V6 3.3 LTS, National, Mod 2001, it turns out that they changed the gasoline pump, they tell me to turn out of that, the cold truck bone in the morning with 3 llavazaos, but already working and if they turn it off for some reason they have to give it in 5 or 6 llavazos to start. Already starting the truck works at 100 ... the VDD ... I don't know what it is ...
something that they recommend me .... how to check gas pressure, or some air pacifier, ????

I am waiting for your comments

thank you very much

Salu2

It happened to me in a C 1500 when replacing the pump the problem was that the pump was not eactly the same and had a valve as a precion release and downloaded, Czech wanted to be the same problem

Ok. I'm going to see with the owner, since I got failing, to check that it is for the year and model.
In fact it is what I think and comment that a pressure of gasoline is missing.
thank you

Eye friend because the one they sold to me went to the model and year brand and still did not correspond. It is better to compare it.