Quote Originally Posted by harimon21 View Post
Driving a lancer 91 EFI. Lately may intermittent problem sya na di ko maintindihan. Naeexperience ko with more frequency lately na ung engine parang sinisinok and nagjejerk (di naman nagtatagal) kapag tatapak sa gas lalo kapag akyatin at mag-oovertake, then noticeable yung loss of power lalo na pag accelerating. Some days normal sya, some days hindi. Lumalabas yung sakit lalo na pag-long drive, seems ok on short level trips though. I suspect fuel pump, kase parang kinakapos at bagal umakyat ng rpm. Ok naman air filter, sparkplugs and no CEL is present. Some say might be dirty fuel tank. Ano kaya?
Subukan mo drain mo ung fuel tank mo para mapalitan ung gas to rule out ung dirty fuel tank/water in tank. kadalasan naman may drain plug ang mga gas tank sa ilalim sa lowest point nito. Tapos lagyan mo na ng gas paka drain mo bili ka ng fuel system treatment/gas treatment parang STP sa ACE meron nun ihalo mo lang sa gas. Panglinis un ng injectors pero damay na rin ang tangke. Kapag ganun pa rin cguro fuel pump na talaga.