Question about Isuzu Trooper

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My 2001 Isuzu Trooper 4JX1 diesel engine check engine light wil not go off. My oil presure drops to 0 psi erratically but the oil light won't go off

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Replace oil pump. then light will go off

Posted on Jul 31, 2010

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Posted on Jan 02, 2017

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2 Answers

What is crank position sensor on Isuzu trooper 2002 3tdi


What is? It tells the ECU what position the crank is in to control timing.

Feb 13, 2015 | 2002 Isuzu Trooper

1 Answer

Oil pressure problem


if you have a 4jx1 3.0 engine then the engine wont run properly because engine oil pressure is what drives the direct injection system.
Check for blocked oil filters 2 pieces if not remove the oil pan and check the oil pickup tube for oil sludge blockage

Jul 14, 2014 | 2001 Isuzu Trooper

1 Answer

Why the diesel mixed in engine oil for isuzu bighorn 4jx1 ,how to fix?


lots of ways.
all bad.
someone poured it in is 1. (jiffyboobs?)
extreme engine flooding may be one way, on a very worn engine.
leaking past very bad piston rings.
or the induction filled up with Diesel and backed up to some vent to crankcase, (PCV system, breach)
or far worse , cracks where cracks dont belong.

May 03, 2014 | 2001 Isuzu Trooper

1 Answer

My isuzu wizard 1999 model diesel mixes with oil, I was thinking to change Nozzles the engine is 4jx1


If oil mixes in the combustion chamber, then you're up for an engine overhaul. Nozzle changes won't do.

Nov 04, 2010 | 1999 Isuzu Trooper

2 Answers

I cant find the location of diagnostic socket of Isuzu 4jx1


The ODB socket is just under the plastic trim that goes over the gearlever cover by your right foot , no tools needed to get it out .
The 4JX1 is a HUEI type engine so the diesel is not under high pressure until injected .
To prove if the fuel is starved put fuel in a can and pipe it into the hand primer pump direct .
Most likely cause is the Rail Oil Presure Sensor as this controls the amount of fuel injected via the ECU .

Jun 18, 2009 | 1999 Isuzu Trooper

2 Answers

My Isuzu Trooper 2004 4JX1 turbo just underwent a general engine overhaul. Its cranking but will not start. All electricals are ok. Does the PCM needed to be reset for it to start?


The ECU will be fine with a engine rebuild but the 4JX takes a bit longer to start if all the injector oil paths are empty - can be up to 5 or 6 mins of 20 second cranking bursts.
Also if you rebuilt due to diesel in the oil from bad injectors the control valve for the injector oil pressure may be faulty so it wont start.

Apr 08, 2009 | 2001 Isuzu Trooper

1 Answer

Need torque settings for dual mass flywheel in 3.0 isuzu trooper


diesel 4JX1 engine
apply engine oil to threads
1st- 59Nm(43lb ft)
2nd- 60-90deg.
3rd- 60-90deg.

Jan 03, 2009 | 2001 Isuzu Trooper

4 Answers

Isuzu 4JX1 EngineWont Start after replacing new injector


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.

Aug 09, 2008 | 1999 Isuzu Trooper

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