My car a Acura Integra GSR 1994. B18C1, P72 ECU, Hondata S200, 750cc injectors, T3/T4. I have 2 problems that I don't can solve and make me crazy!

1) The first problem is this: If I start the car and go in a downhill (in a constant speed I don't need to use the throthle, second gear) and I stop the car, the rpm go to 0 and the engine stop (it dies).

2) The Second problem is: after the engine die, if I trie to start it immediately the engine don't start, the fuel pump don't start and I need to wait some time (aprox 2 minutes) and the engine start withou problem.

I realy preciate all the help.

PD.- Please excuse my bad english, my natural lnguage is the spanish.