Dear sir MY bighorn 4JX1 have problem it sudenly cut of the engine and it start again, but it is comming offen. At beginng it looks fuel shortage, but isn´t, then i notice that before it cut off it make noise as someting hiraulic is shuting down. There is no computer check here where I live, but can I check some sensor? which ones and where they stay?

Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

this is a USA forum what country are you in?
Fuel systems vary by engine, and country, so......?????
what needs fix'n?

the word fix has many meanings

• how to rebuild the pump?
• time it?
• how to remove it put back?
• how to bleed it.
• and on and on... or a lift pump or ?

try to say what you are doing "the job" and why,
or if not a job, must be diagnosing it, ?
say , im trying to test it or. what ever you doing.
we cant guess, what fix means.
Diagnosing direct injection?



The 4JX1 is a 3.0 L direct injection diesel engine, turbo, some intercooled, which replaced the 4JG2 in the Isuzu Bighorn/Trooper/Holden Jackaroo.
It uses unit injectors and 4 valves per cylinder.

European and Asian buyers could opt for the diesel.

see we dont have this.
troopers are sold in Asia too, but not here with diesel.

wow first post ever posting country ,what a brave person. !!!!
welcome to USA forums ,that have no such car.(truck)
the line up. (wiki list) so its 3.0L 4JX1
stalls and lost power.
The 4JX1 is a 3.0L direct injection diesel engine, turbo, some intercooled, which replaced the 4JG2 in the Isuzu Bighorn/Trooper/Holden Jackaroo. It uses unit injectors and 4 valves per cylinder.

can be caused by many reasons. get it scanned yet. ?
or see FSM book on flash codes from the direct injection fuel
controller? (per this engine option and market)

does turbo have proper boost? (PSI boost or +1 bar boost?)
does it even have a boost gauge.?
there are over 50 causes, of stalls (most inside engine)
but its not getting boost or the injection rates are wrong.
there are basic tests for each covered in the FSM
Factory (oem) service manual, with coverage for this engine.


3.2 L 6VD1 SOHC V6
3.2 L 6VD1 DOHC V6
3.5 L 6VE1 DOHC V6
3.0 L 4JX1 TD I4
3.1 L 4JG2 TD I4

If you like I can send you one. I need the make, model and year of the vehicle as well as the VIN number.

Its a diesel and its running away so do not try to start till you do the following and yes i know i will be amolished for being a cowboy by the other experts but what you do is to make a gasket for the EGR valve from a coca cola can and seal it off if you dont it may run away and blow itself to pieces .If you do this then it run as normal as the older trucks never had these thing fitted and they all run ok in my day ,exactly whats wron i couldnt tell you without my head under the bonnet but do as i say and it run perfectly

MAKE SURE THAT WHITE EXHAUST ISNT ANTI FREEZE. CK the spark plugs for fuel and/ or coolant. After cranking for hours damage can occur.

You have no injection pump ,each injector does that job .
You have a faulty rail oil pressure sensor I think ,read my tips to test this sensor .

Dear sir I have Bighorn 3.0 4JX1 car. Suddenly it start cuting of engine while running, like no fuel, but it start again. But sometimes it doesn´t. and before cutting it make noise us the fuel supply is cuting in the pump. Here we don´t have computer scan. Can someone indicates where to check? which sensor? Thanks

check the mass air flow sensor. I guarantee that's the problem.

my isuzu bighorn will not start after changing valve seals and head gasket and after setting timing it still will not start. do you have a solution.