try nyo po yung fuel filter.

dati sa nanay ko starex crdi gradual loss of power hanggan namamatay na makina ng tuluyan. after a minute or two of waiting aandar nanaman sya uli only to repeat the entire cycle again after just a few kms.

it was contaminated fuel resulting to a clogged fuel filter so after 2,000 plus pesos, a new filter and draining the fuel tank ayos na uli sya. hth

p.s. binasa ko po uli yung symptoms. try nyo din pa-check yung variable geometry vanes ng turbo baka for some reason di bumubukas consistently kaya may loss of power po kayo