Diesel Fuel Injection System Help Desk

[eajrapogi]

Sir dieseldude, thanks for the response.. yup tama po kayo low power po ang sasakyan. 60kph max lang po takbo ko. tapos i tried to run some diagnosis, ang napansin ko po is that yung rpm ko hindi sensitive like halfway press na ang throttle pero 2000rpm palang ang reading ko and pag fully depressed na ang throttle about 5-10sec dun palang magiincrease from 2000rpm up. tingin ko rin na sensor problem kasi delay ang response niya but im not that sure.

Also ask ko lang, regarding sa sectional damage ng ecu? is it on the ecu itself or sa mga input and output devices ang cause?

Many thanks to you Sir

[Dieseldude]

Sir dieseldude, thanks for the response.. yup tama po kayo low power po ang sasakyan. 60kph max lang po takbo ko. tapos i tried to run some diagnosis, ang napansin ko po is that yung rpm ko hindi sensitive like halfway press na ang throttle pero 2000rpm palang ang reading ko and pag fully depressed na ang throttle about 5-10sec dun palang magiincrease from 2000rpm up. tingin ko rin na sensor problem kasi delay ang response niya but im not that sure.

Also ask ko lang, regarding sa sectional damage ng ecu? is it on the ecu itself or sa mga input and output devices ang cause? It can be on any part of the ecu....depends on what part was electronically damaged. It can also be external to the ecu, like a broken wire connection to a sensor or actuator.

Low power could be caused by a restricted fuel and/or air filter, or a bad/wrong vacuum line routings.......so many things to check.

Question.....why did you replace your engine?

Did low power occur after the change engine?



Many thanks to you Sir

[eajrapogi]

Low power could be caused by a restricted fuel and/or air filter, or a bad/wrong vacuum line routings.......so many things to check. sir can you enumerate all the things that should be checked so that i can perform a diagnostic checks on those areas. I have also speculated the vacuum line routings kasi parang nahihirapan huminga ang sasakyan, though newly changed na air flter. i haven't checked the fuel pressure,so try ko icheck muna yun.

Question.....why did you replace your engine? i replace the whole engine and transmission for convenience kasi yung old engine almost battered na from the past 11yrs na rin kasi naamin itong hilux and pamana lang ni erpats, e ayaw ibenta kaya ganon nalang naging strategy also nakaroon ng mechanic error nangatok po ang engine,

Did low power occur after the change engine? low power was already present from the past engine same scenario 60kph pa rin.Kaya ako nalang po muna nagpeperform nang mga diagnostic check to lessen the expenses, also for self-learning na rin po.


Hope matulungan and maguide niyo po ako.

Thank you and More Power

[Dieseldude]

Low power could be caused by a restricted fuel and/or air filter, or a bad/wrong vacuum line routings.......so many things to check.[/COLOR] sir can you enumerate all the things that should be checked so that i can perform a diagnostic checks on those areas. I have also speculated the vacuum line routings kasi parang nahihirapan huminga ang sasakyan, though newly changed na air flter. i haven't checked the fuel pressure,so try ko icheck muna yun. I cannot list down all things to check........too many...... I suggest you visit a qualified workshop.

Question.....why did you replace your engine? i replace the whole engine and transmission for convenience kasi yung old engine almost battered na from the past 11yrs na rin kasi naamin itong hilux and pamana lang ni erpats, e ayaw ibenta kaya ganon nalang naging strategy also nakaroon ng mechanic error nangatok po ang engine,

Did low power occur after the change engine? low power was already present from the past engine same scenario 60kph pa rin.Kaya ako nalang po muna nagpeperform nang mga diagnostic check to lessen the expenses, also for self-learning na rin po. Check pedal position sensor. It might not be going to 100% at wide open throttle...


Hope matulungan and maguide niyo po ako.

Thank you and More Power :bowako

[eajrapogi]

ok sir i'll check the pedal sensor tomorrow. sir regarding bad/wrong vacuum line routings. how to check if they are not the proper routings? also can you show me their proper location/place? Thank you Sir dieseldude.

oh also the last time I last have it checked. they tried to lift the car and had it free run and ok naman yung takbo 140kph. but when put onto ground there 60kph lang.

[POPPIX]

Sir DD,

Ano po ang purpose nung dalawang oring ng injector sleeve ng 4jx1 (taas at baba)?

Ano din po ba ang dhilan ng pagtaas o pagdami ng langis sa oil sump?


Salamat po,


POPPIX

[Dieseldude]

]Sir DD,

Ano po ang purpose nung dalawang oring ng injector sleeve ng 4jx1 (taas at baba)? Two orings on the injector sleeve prevents fuel from leaking. Fuel will dilute crankcase oil if upper oring is bad.

Ano din po ba ang dhilan ng pagtaas o pagdami ng langis sa oil sump?
1) Injectors with internal leakage
2) Bad injector oring
3) Bad injector sleeve orings

From experience, some used injectors which seem to perform well on an engine may be leaking internally and cause dilution of crankcase oil.



Salamat po, You're welcome...


POPPIX

[POPPIX]

]Sir DD,

Ano po ang purpose nung dalawang oring ng injector sleeve ng 4jx1 (taas at baba)? Two orings on the injector sleeve prevents fuel from leaking. Fuel will dilute crankcase oil if upper oring is bad.

Ano din po ba ang dhilan ng pagtaas o pagdami ng langis sa oil sump?
1) Injectors with internal leakage
2) Bad injector oring
3) Bad injector sleeve orings

From experience, some used injectors which seem to perform well on an engine may be leaking internally and cause dilution of crankcase oil.



Salamat po, You're welcome...


POPPIX

Sir DD,


May paraan po ba na malaman kung walang internal leak ang injector bago ikabit?

Yung mga sinasabi po b nilang modified ung 56k pataas ang serial no. e ng kakaron din ng internal leak?


Pwede po kaya na madaan pa sa linis ang injector baka kasi napuno lng ng carbon yung nozzle ng injector?


Pwede din po kaya na pag palitin ng internal parts ung mga injector para mabuo kung solenoid lang ang sira ng isa at yung isa naman ay yung oring sa loob?


Salamat po ulit,


POPPIX

[Dieseldude]

Sir DD,

May paraan po ba na malaman kung walang internal leak ang injector bago ikabit? Walang paraan.

Yung mga sinasabi po b nilang modified ung 56k pataas ang serial no. e ng kakaron din ng internal leak? Hindi ko alam. Pero sa palagay ko, less prone to internal leakage ang upgraded injectors. Inupgrade ito ng Isuzu para ma correct yung problem.


Pwede po kaya na madaan pa sa linis ang injector baka kasi napuno lng ng carbon yung nozzle ng injector? Pwede linisin kung madumi lang. Hindi maayos sa linis kung meron damage ang internal parts.

Pwede din po kaya na pag palitin ng internal parts ung mga injector para mabuo kung solenoid lang ang sira ng isa at yung isa naman ay yung oring sa loob? Hindi pwede pagpalitin ang internal parts dahil matched ito lahat; magbabago ang injector performance.


Salamat po ulit,


POPPIX

[ollopasagla]

Sir DD,

Normal ba na may lumalabas na kaunting usok galing sa compressor outlet ng turbo papunta sa intercooler?
2.8 jdm pajero 98, AT, 4m40 engine.

Salamat ng marami,

Ollopasagla