4JA1 Engine, Are there any problems?

[digitel]

Hello there, I just want to know if anyone of you had experienced any problems with this engine?

Kasi kami as of now wala pa. We have 2 isuzu with this engine =)

Reliable talaga itong engine na ito?

[niky]

Two Crosswinds. So far, no trouble. Have had to have a mechanical pump fixed at 150,000 kms on one, but it was poorly maintained. The one that I'm responsible for is at 180,000 kilometers, much of it in traffic and at high speed. So far, it doesn't belch blue smoke, doesn't eat oil, and still gets around 10-14 km/l on the highway. (14 when I'm actually patient enough to drive it at a sedate 60 km/h.)

[ramledi]

i have 2 hilanders and my main problem is eliminating the smoke emission problem.

its kinda embarrassing when accelerating hard. too much smoke when looking at the rear view mirror. but its normal for a 4ja1 hehehe

[digitel]

^ I agree, i find it also embarrassing T_T. Pero minsan hindi na naman siya masyado mausok. Pero pag malamig masyado ang weather kahit naka idle minsan mausok siya...

[bok19]

i agree wid dis. hehe

[4JGtootsie]

Hello there, I just want to know if anyone of you had experienced any problems with this engine?

Kasi kami as of now wala pa. We have 2 isuzu with this engine =)

Reliable talaga itong engine na ito?

Its reliable, solid and efficient.
Problem is starting it pag mababa na compression (high mileage).
Direct injection require high compression(heat) to fire, without glow plugs it will be a long and shaky start.

[ExROLLA]

4ja1 problem: white smoke emission... takaw sa sita, specially in makati and pasig... kahit bagong unit, talagang obvious ang white smoke...

[anthon05]

my 2001 xto mileage is 110k... problem ko yung white (blue) smoke evident sa morning or bagong start, pag mainit na nababawasan na.

ang question ko puede ba maayos ito? i mean if i bring it sa calibration shop mawawala ba white smoke emission?

or temporary solution lang. im planning kasi dalhin ito paayos ko or something.

baka normal lang sa 4ja1 na mausok at amoy unburned fuel?

[niky]

Blue smoke is oil. It should be evident in checking your dipstick whether the oil level is going down or not.

White in the morning is just water, that's normal.

[anthon05]

so ok lang yung white smoke? ang ayaw ko lang talaga yung lakas ng amoy

ng diesel fuel sa usok. yung white smoke diminishes as i use the vehicle, pero

yung amoy ng unburned fuel medyo malakas.

[vhazon]

sa totoo po wla ng solution ang smoke sa 4JA1 engine pwede lang pahinain ang usok.. sasakalin ang daloy ng fuel pero syempre babagal saka proper maintinance air filter, change oil every 6 mos pero masmagnda gawing every 5mos. pati sa trans mission ipag sabay narin, ipapacheck din yung turbo bka busted na,, , kahit ipa calibrate pa, hndi rin po maganda ang yung mga isinasalpak na anti smoke gadgets sa makina dahil pwedeng pasukan ng oxygen yun makina at mag moist, magkakaroon ng katok ang makina mo.. nalaman ko po yan sa kumpare ko mechanical engineer sya na may sariling talyer marunong din sya gumawa ng makina mekaniko sya bgo sya makgraduate...

[Sleepcare]

*vhazon-Baka naman nasanay ka lang sa innova. Hindi naman talaga maiiwasan ang hataw lalo na pag bago. Kasi hindi naman ata yung fuel pump ang sira kasi sabi mo nga eh medyo mabilis parin naman.

[TAMSDep]

mag sirs, just want to ask kung paano pumino takbo ng hilander, napa calibrate ko na fuel pump injector, linis nozzles, palit fuel filter and sedimentor (manual pump) , linis tanke pati fuel lline, nag vivibrate parin yung engine. although di na ganoong kalakas pero di pa rin pino yung takbo ng engine. gumagalaw(vibrate) ung kambyo kahit idling. rpm is 700-800 with and without AC.

[ramledi]

mag sirs, just want to ask kung paano pumino takbo ng hilander, napa calibrate ko na fuel pump injector, linis nozzles, palit fuel filter and sedimentor (manual pump) , linis tanke pati fuel lline, nag vivibrate parin yung engine. although di na ganoong kalakas pero di pa rin pino yung takbo ng engine. gumagalaw(vibrate) ung kambyo kahit idling. rpm is 700-800 with and without AC.

normal lang naman sa old diesel ang manginig. pwera na lang kung yumuyugyug ka sa loob ibang usapan na yun hehehe

pagmasdan mo yung makina mo habang naka-idle. kapag consistent ang nginig normal yun. pero kapag every now and then nasusundan ng malakas na nginig ayun ang may problema. either madumi ang injection nozzle o may air sa fuel line.

baka nga pala may nakakaalam ng part number ng injection nozzle natin paki reply naman. balak ko kasing magpalit ng injection nozzle para bago uli.

[Yong-Yong]

may nabasa po ako n nag tanong ng part no. ng injection nozzle..kakahiya antagal ko ng pumapasyal dito sa site n'to di pako marunong nag reply at post ng picture..Anyway, naka lagay po sa workshop manual ko..try kung post yung link ng photo..pasenya na'po kyo!

[IMG][/IMG]

[ramledi]

anong site galing yan?

[Yong-Yong]

*ramledin
personal copy ko po yan...workshop manual ng isuzu TF series...engine covered: 4ja1,4ja1T,4jb1T,4jG2T

[sprite]

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

[IOwnIsuzu]

Kailangan na po ba ng calibration dito? o linis yung mga nozzles and injectors? 51k mileage palang po siya

[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)