Not aselera

He is an Isuzu man of 97 Gasoline engine starts but does not aselera codes P0107, P0113, P0122, we changed time chain and it already had the problem, valve calibration, we checked the Tienpo and if you abagense, we measure signs and do not have the reference 5, in MAP, TPS, the CONPU if it has its feedings, of current, precion of fuel, fuel Failure in progress and suddenly lost strength. The rare is that if it starts.