Question about 1999 Isuzu Trooper

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Isuzu Trooper 3.0D DOHC 4JX1 CAN''T START AFTER REPLACING FLYWHEEL Three weeks ago I replaced the faulty dual mass flywheel with a second hand but working one + Diesel and oil filters for engine and Turbo. From then on the 4JX1 engine refused to start. An expert mech. checked the flywheel sensor and declared it fit, still he could not start it. It cranks and produces all the signs of attempting to start but fail to. Did I overlook something? Can you please help out?

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You need to set the timing to top dead centre and the flywheel has a little knotch in it set that at 6 oclock will start then

Posted on Oct 02, 2012

  • robertjmears
    robertjmears Oct 02, 2012

    you need to set the timing to top dead centre and the flywheel has a little knotch in it set that at 6 oclock will start then

  • Hi Sir Cleme, I cannot remember any sensor being on the flywheel of the 4JX1 engine, but I do suggest you check the crankshaft and cam shaft pick up sensors. After checking those sensors make sure you have evacuated all air from the fuel system. Regards John

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Hi again Clem, Just read this comment. Sorry Sir Clem, The crank and cam sensors control the injection working in unison with the O.R.P. Sensor. Make sure the battery is turning th engine at the required speed, as a depleted battery will turn the engine too slowly for the signal from the ORPS to open the injectors. Also keep in mind that the engine is a common rail injection system, meaning that once pressure is released from any injector, all pressure is lost. Use of the incorrect engine oil can damage the ORPS and result in a refusal to start. Regards John

Posted on Apr 24, 2014

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Open one of the injector lines till fuel pumps out

Posted on Jun 22, 2011

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  • sircleme Jun 23, 2011

    Tried it. Not a drop of fuel pumped out. Seems the injectors are not initiating current.

  • jhong_tolent Aug 04, 2011

    the crankshaft has a timing mark on the flywheel. so u might have installed the flywheel incorrectly...u will have to pull down the transmssion again and try re-timing it..be sure to locate the mark, im sure this will solve the problem

  • Hi again Clem, Just read this comment. Sorry Sir Clem, The crank and cam sensors control the injection working in unison with the O.R.P. Sensor. Make sure the battery is turning th engine at the required speed, as a depleted battery will turn the engine too slowly for the signal from the ORPS to open the injectors. Also keep in mind that the engine is a common rail injection system, meaning that once pressure is released from any injector, all pressure is lost. Use of the incorrect engine oil can damage the ORPS and result in a refusal to start. Regards John

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I HAVE A 2000 TROOPER WITHA 4JX1 ENGINE THE MECHANIC TOOK OFF THE CAM AND DONT KNOW HOW TO TIME IT BACK CAN ANYONE HELP ME WITH THE TIMING OF THE CAMS


The 4JX1 engine is a diesel and you may have trouble finding the distributor or even the right hand bank of cylinders since it is a 4 cylinder motor. You will need a service manual to time the camshafts and make sure you use 5W40 oil as anything thicker will cause poor starting when cold. I had a Holden Jackeroo from hell and it suffered 2 engine runaways due to bad injector seals,multiple faulty sensors, a failed dual mass flywheel, and a broken oi lpickup in the sump. Get it running and get rid of it!

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I have an Isuzu Bighon 1998 3.0 Diesel Dotch Engine which i purchased second hand. It is absolutely great when the engine is hot. It has issues with starting especially after being parked for more than 4...


ISUZU HAS A RECALL ON LEAKY INJECTORS ON THAT TRUCK GIVE THEM A CALL The injectors use the engine oil at very high pressure to inject the fuel, and semi synth oil just can't withstand these high pressures for very long. It breaks down, loses it's viscosity, and then the injectors won't work properly.
Change the oil to fully synth, and you should see a huge difference. (Do both oil filters while you're at it too).
1. Injectors. Usually the electronics in them fail and cause a miss fire.

2. Injector Sleeves. Causing diesel to leak into the sump and in severe cases the oil/diesel mixture filling up to such an extent that the vehicle actually runs on its own, on the mixture. This can cause the engine to rev to the maximum until all the oil/diesel mixture is burned or the engine basically destroys itself.

3. Rail Pressure Sensor. If the E.C.U cant determine what pressure is at the rail the vehicle may not start or stop running . A fairly simple fix with only the rocker cover needing to come off.

4. Rail Pressure Control Valve. This controls the pressure supplied to the rail. Engine will not start if this control valve is faulty.

5. Turbocharger. A very unreliable unit. Seals usually go after 50000miles.

6. Dual Mass Flywheel. Seldom give trouble but I have seen a few that have. If the new flywheel is taken off and not put back in the same way as the old one (lined up via a half moon shaped mark) the engine will not start as the flywheel sensor will be unable to determine the position of the flywheel.

7. Throttle Position Sensor. Fairly troublesome. Usually no deteriation in driveability but will bring on the engine light.

The engine is a gem when running correctly but unfortunately its a rare occurrence. I think the 02 onwards models had a lot of modifications done to them such as improved injectors etc.

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Need torque settings for dual mass flywheel in 3.0 isuzu trooper


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2003 Tiburon 6 spd clutch replacement now tranny won't respond


Possibility, you may have intalled the clutch disk backwards.... if so, the disk hub is torqued against the crankshaft hub preventing engagement of the clutch. 2003 TIBUORN DUAL MASS FLYWHEEL AND CLUTCH DISC ASSEMBLY INSTALLATION PROCEDURE DESCRIPTION: The 2003 MY 2.7L Tiburon vehicle equipped with the 6-speed manual transaxle employs a dual mass flywheel system. The 2003 Tiburon Shop Manual does not show the clutch disc assembly with the dual mass flywheel. This bulletin provides information about how to assemble these components. NOTE Although it is possible to assemble the clutch disc with either side facing the flywheel surface, only the assembly of these two parts shown in this bulletin is correct.
PARTS ASSEMBLY:
  1. Attach the dual mass flywheel to the engine crankshaft assembly.
  2. Identify the clutch disc flange side and the collar side as shown. 0240025a.gif
  3. Install the collar side of the clutch disc on the dual mass flywheel surface so that the flange side is facing the pressure plate side as shown. 0240025b.gif
  4. Attach the pressure plate to the dual mass flywheel and complete assembly of the remaining components per the Shop Manual procedures. 0240025c.gif

Dec 14, 2008 | 2004 Hyundai Tiburon

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