Question about Isuzu Trooper

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Hi I HAVE A ISUZU WIZZARD 3.0 WITH 4jx1 engine,it hard to started,diesel knock when it idle,engine light stay on with a code p10193 or p1393,already replace fuel filter,engine oil,train and renew a diesel fuel from the tank,If the engine light turn off, engine is running smooth,already try a second hand computer still the same,what could be the problem

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Hi, you problem is the rail oil pressure sensor having a high voltage input -  P0193 code set . This will also cause your faults . 
Change the sensor which is under the cam cover and the smaller of the two there and it will run ok .
You need the sensor set up on a tech II after fitting to run at its best.

Posted on Oct 03, 2009

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Have wizard 2000. In the beginning had starting problems and at idle it wouldn't take rpm and it won't start.

Posted on Feb 09, 2010

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Posted on Jan 02, 2017

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2 Answers

Have a Isuzu 4hg1, assembled the engine and started it. I run it for two kilometers n hear the knocking sound n believe its a fuel knock. How can I fix the abnormal sound?


at idle only, when,does it knock.... wow.
no car stated, sure a huge truck,, 4.57 Liters small.lol
what truck? my guess NPR huge.
is the TURBU -T 4HG1-T?????
Applications include the 2000 Isuzu NPR350A
what year.?
what country?
we know its a diesel"H"
but old ones all knock, (detonate)with mech,injectors, (for sure at idle !!!)

on a new trucks not(with common rail,? direct injection and smart EFI controls)knock ends.

see the old engine
has 9degree injector pump timing
do that? got that?
the new NPR trucks sell this same engine
with Direct injections,knock?
,my guess. a leaking injector DID. if new truck>?
direct injected, is it?
or EFI brain stuck on limphome ,mode ,scan it?

see why not staying year, is IMPOSSIBLE:
the engines in 2000 are NOT same as now,
totally different efi fuel systems.1024092b-cf5d-4452-8e68-40060a48c7e5.jpg

Feb 17, 2017 | Isuzu Cars & Trucks

1 Answer

4JG2 ISUZU HARD STARTING WHEN ENGINE IS HOT I CHANGE MY A BRAND NEW BATTERY ALREADY


no year car
no car stated, at all,
no county stated either.
just and engine,diesel
find a diesel shop,

start with hand done test fuel ,spray
sound like low compression hot;
.Zexel make. In-Iine Bosch A type.PUMP has problems.

Jan 30, 2017 | Isuzu Cars & Trucks

1 Answer

Why does my rodeo diesel 2.8l 99 model when cold starts at accessories point & glow plug light stays on longer?


sounds as though the cylinder,s etc are a bit clogged up, try some diesel fuel addative,as with all diesel engines if they do not get long and regular journeys the glow plugs,injectors etc get clogged ,as the engine does not get hot enough to burn these deposits off on short stop start types of journey's . you are possibly looking at replacing the glow plugs but give the addative a try and if possible take for a long drive 2-3 hours at steady highish speed , ok to repeat the addative and long drive once more ,if no improvement will need to go into the repair shop to have the glow plugs seen to at the very least , good luck

May 12, 2014 | 1999 Isuzu Rodeo

1 Answer

Isuzu bighorn diesel


run the fault codes to find the reason for the engine light and the transmission light

Mar 14, 2014 | Cars & Trucks

1 Answer

Hi Gurus, My 4JX1 engine is vibrating on idle. Idle speed is about 750rpm. At hgher speed the engine runs smooth. The problem is the engine dies off in the middle of driving. Sometimes it will start again...


Are you running the recommended oil grade? As the injection system is operated by engine oil pressure using the wrong oil grade can prevent your car from starting, running smooth or hard starting! Ideally they require a 5W30 oil grade. Idle speed is controlled by the engine control unit! It's a common rail diesel engine so there's nothing to adjust! The Camshaft position sensor could also possibly be intermittently faulting causing similar symptoms! It's located on the front of the cambelt cover(gray coloured sensor)

Oct 08, 2010 | Isuzu Trooper Cars & Trucks

4 Answers

PO1290 CODE


I just got one today with the same problem; both lights and code p1290 hard to start and once started stayed at idle with no accelleration . If you have already fixed it would be nice to share the info. If not already done ill tell you when i fix this one.

Sep 18, 2009 | 2003 Isuzu Rodeo

2 Answers

Knock in engine


it can also be an injector. injectors tend to supply more diesel after long service. To check if this is the problem: let the motor idle whilst it knocks. start from the front of the motor- loosen no1 injector fuel line- the motor will start idling roughly as fuel supply to no1 piston is starved. If the knock persists, tighten the fuel line and move to no2 injector and repeat the process. the knock will gradually go away if one of the injectors' fuel lines are loosened and the injector is faulty. If you get 1 or more injectors with these symptoms, remove and replace the injector. If the problem persists, it can either be that one of the diesel pump plungers are worn and supplies too much fuel or a big end bearing is faulty.
RegarsCarel de BeerSouth Africa

Apr 06, 2009 | 1991 Toyota Celica

2 Answers

Isuzu 2001 diesel engine won't start


cant start deisel 3.0 lilter sounds like there is no fuel getting to the engine

Jan 19, 2009 | 2001 Isuzu Trooper

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