4JA1 Engine, Are there any problems?

[dh0n]

^ change oil,air filter,fuel filter...baka sobrang baba ng rpm mo 750rpm idle without aircon aroung 800-850 with aircon...

kung ok naman lahat try the 2t oil theory...read kalang ng other thread (diesel owners that add 2t)

[dh0n]

sir kmzta po..ask ko lng po kc yung fuego na 2004 model ko..ngoverheat sya kapg ntrafic at nkapark..ngbabago din yung menor ng engine at nawawala lamig ng aricon..pingawa ko na radiator,injection pump,pti chnage oil tuneup na ko ganun pa din?salamat

sir yung thermostat mo ok pa ba? remove or replace the thermostat...nung ginawa ba radiator ay lininis ang mga cooling fins using sosa and power spray? it will help IMO...

by the way tignan mo rin ang radiator kung hindi bumubulwak ang tubig pag naka idle ka if bumubulwak its a worn out head gasket or worst cylinder head...

[Bags™]

4JA1 - very reliable, easy to maintain, matibay, and fuel frugal diesel engine. Had one with my 92 Isuzu LS Pick-up with 281,000+ kilometers in it. Tamang maintenance lang talaga ang sikreto. Common lang talaga dito yung medyo mausok. Sa akin ganon din compared sa iba naming sasakyan (Intercooler Turbo 4D56, TDCi, and Hyundai CRDi) pero hindi naman mausok na akala mo nagpapaapoy ka ng mga dahon at sobrang itim. Normal na usok lang from exhaust and the smell is like normal although yes compare sa ibang engine namin medyo (iba ang amoy, but still amoy diesel pa din). Almost 70% of the parts in my pick-up are still the original parts when it was bought brand new way back in the 90s. Only problem experiencing right now is this:

1. It is somewhat shakey (maalog) especially pag naka-ON ang A/C. Sa lower idle speed nya the car starts to vibrate abot sa cabin and yes noon malakas. At first I thought engine supports, but then we had it fixed with the help of our mechanic na may ganon din na sasakyan, nilinis lang pala yung Air Filter kasi madumi na even konting lumot meron na plus nilinis din also yung Fuel Pump because may tubig na daw i don't know gaano kadami. It went back to normal again, hindi na maalog sa kahit anong idle speed range and we were able to bring down the idle speed to normal which is 850 rpm. The only thing is it's starting to rattle now again pero very very minimal lang and very very weak na rattle lang pero syempre lahat naman tayo metikuloso sa sasakyan natin diba? i'll have it checked nalang again (the fuel pump) and I will try to clean the air filter again this time and maybe change it next week. We'll see the difference kung andoon talaga. But then if hindi pa din mawala ang rattle/vibration sa paglilinis ng air filter and fuel pump, maybe I really have to check the engine supports.

Over-all this 4JA1 engine is a very reliable diesel engine. Kahit yung maikarga mo dito na fuel (by accident) ay madumi or may water or whatsoever (hindi naman maiwasan ito sa ibang gasoline stations esp sa far-flung areas), never mo ma-eexperience na masisiraan ka ng engine. Base on my experience, pupugak lang ng konti but when nasunog na yung fuel, okay na sya. Unlike some of my friend's CRDi engines, nadumihan yung fuel. Boom! Sira na injectors

[Syuryuken]

tibay ng makina na yan problema lang talaga makupad tinatakbuhan nga ng mga 800CC na sasakyan

[n_spinner06]

tibay ng makina na yan problema lang talaga makupad tinatakbuhan nga ng mga 800CC na sasakyan

Yung amin hilander xtrm yr 2000 non-turbo 4ja1. Hirap mag-100kph pedal to the metal na unless medyo downhill kahit hindi loaded. Madalang itakbo ng highway to halos purely city driving. Normal ba to?

[shelu]

Yung amin hilander xtrm yr 2000 non-turbo 4ja1. Hirap mag-100kph pedal to the metal na unless medyo downhill kahit hindi loaded. Madalang itakbo ng highway to halos purely city driving. Normal ba to?

check mo fuel filter at sedimentor, baka barado na po sir. palit air filter din po sir. if ganun pa rin, pa check mo ang injection pump sir. o baka ang preno mo sir, nakakapit palagi. many possibilities but start at the basic.

[aioshin]

ano naman kaya problema kung paakyat, parang hirap, yung stop ka then paakyat na, so start ka sa first gear, tapos nahihirapan... ano kaya pasibleng problema... new fuel filter, new air filter, just cleaned water separator. Napansin ko lang, almost half yung temperature ng engine sa gauge... sentomas ba to nang isang engine problem?

[n_spinner06]

check mo fuel filter at sedimentor, baka barado na po sir. palit air filter din po sir. if ganun pa rin, pa check mo ang injection pump sir. o baka ang preno mo sir, nakakapit palagi. many possibilities but start at the basic.

thanks for the reply sir shelu...crossing my fingers na hindi injection pump. ok naman takbo normal traffic, bagal lang naman. yun nga lang 80kph lang tapos gapang na acceleration or minsan hanggang dun na lang talaga. 1500km pa bago yung next na servicing, baka hintayin ko na lang para papalitan fuel filter at check yung brakes...yung sedimentor di ako familiar. pinapalitan ba yun sir o nililinis lang?

[johnjoseph]

Got 2001 Isuzu Fuego LS Pick Up truck with 4JA1 2.5TDi engine, one click start kahit hindi na use heater, nasubukan ko na sa Baguio City last January, hindi na need talaga heater. Hindi masyado mausok, madalas ko masubukan sa SCTEx at NLEx, unlike sa nakikita ko other Fuego pick up, maintenance talaga nagkakatalo. I also add 5ml - Shell 2T oil, Jaso FB for every liter of diesel fill, be it Petron Diesel Maxx, Shell Fuelsave, Caltex or small player diesel fuel, naging smooth ang andar lalo na sa high rpm run, parang CRDi ang andar. Very patient ang engine na ito, sa long drive, hindi siya overheat kahit traffic, medyo makupad lang talaga, umaangil na siya sa 120 kph, hanggang doon ko pa lang na-try, saglit lang yun, pero kung fitted with high speed differential, baka tumulin pa with such a small engine. Workhorse kasi intended use kaya ganoon lang speed.

[blue_gambit]

Solid engine basta properly maintained... pag napabayaan pwede pa rin.. ganun yan ka tibay