fuel pump problem kaya?

[harimon21]

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?

[jick.cejoco]

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?

harimon,
with a car that age, the fuel filter should have been replaced at least three times and the ignition cables maybe two times. check the expendables first. the spark plug wires are due around 100k kilometers.
jick

[harimon21]

Thanks Jick
Have ruled out those you mentioned. I have replaced the fuel filter less than 2 years ago and the spark plug wires just 3 months ago, but still no luck

[Tincan]

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.

[jick.cejoco]

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?

have your engine vacuum checked. it usually tells if the exhaust system is clogged, if the valve timing is off or tell you if the ignition timing is off but confirm with a stroboscopic tilming light. also check your ignition coil output. these should have been done when you had a tuneup specially it was giving you sluggish engine performance

[incus]

you can also try checking yun fuel pump relay, ganyan din problem ko dati
lahat na tiningnan yun pala sunog na yun relay. hth.

[harimon21]

Sorry for this dumb question, but where can I find the fuel pump relay? Also, my gas tank is acting weird lately. When gassing up, the pump would always automatically stop midway upon filling. The gasoline boy would say the tank is full but it is actually not! Hmm?

[Tincan]

Sorry for this dumb question, but where can I find the fuel pump relay? Also, my gas tank is acting weird lately. When gassing up, the pump would always automatically stop midway upon filling. The gasoline boy would say the tank is full but it is actually not! Hmm?

Kapag sunog na ang relay di na gagana totally ang fuel pump mo. ang ginagawa kse ng relay connection lang siya direct sa battery at pinabababa nya ang amps sa mga switch mo at wires mo para hindi lang ito masunog. So kung sunog ang relay ng Fuel pump mo, putol na connection, dapat di na tumatakbo yang auto mo. Tingin ko linisin mo muna gas tank mo. Kse pate ung guage sa loob ng fuel tank mo nagloloko. And wala naman CEL dba? kse kung tune up kailangan nyan or sensors, vacuum, ignition timing...etc. meron na dapat Check Engine light sa panel guage mo.

Anyway, nabaha ba auto mo?

[jick.cejoco]

Sorry for this dumb question, but where can I find the fuel pump relay? Also, my gas tank is acting weird lately. When gassing up, the pump would always automatically stop midway upon filling. The gasoline boy would say the tank is full but it is actually not! Hmm?

harimon,
your fuel filler neck is equipped with a restrictor so you won't be able to pump leaded fuel into the tank, that causes the gas station nozzle to trip, also, the kinks and bends of the filler neck makes the flowing gasoline into the tank create a backpressure simulating a full tank. as for the location of the fuel pump relay, it is on the right side of the console in front of the shifter
jick

[harimon21]

Di naman nabaha yung car. Had checked the relay and its ok. Strange, pag sinusumpong sya what I do is pull over, shut the engine, wait a few minutes, restart then ok na uli. haay