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The problem with my isuzu trooper 2003 model 4jx1 skyroof is that just after it had the change oil I noticed that from cool start the engine starts abnormally having an unstable idle for a while. What could be the problem. Thanks from octavio ilustrisimo jr

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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stormbrewin
  • 426 Answers

SOURCE: isuzu trooper problem!with a 00 3 litre diesel engine not starting

Was it lined up right as the trigger point for the sensor is important.Is the fly wheel fitted one position only that the bolt holes line up or will it fit no matter which position it bolts up Line up the flywheel trigger with the sensor after you have put the engine to Top Dead Centre.Put at tdc and see if the trigger and sensor are together.

Posted on Oct 18, 2008

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  • 1 Answer

SOURCE: isuzu 2001 diesel engine won't start

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

Posted on Feb 15, 2009

simontricket
  • 235 Answers

SOURCE: My Isuzu Trooper 2004 4JX1 turbo just underwent a

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.

Posted on Apr 20, 2009

Suzman
  • 642 Answers

SOURCE: Isuzu Big Horn (Trooper) 4JX1 engine.... Vehicle

Sends a signal related to the rail pressure as a voltage to the ECM. 3 wire connector :

  • Red : 5V (Feeds from ECM connector J1-4) Shared with MAP sensor, EGR pressure sensor and accellerator position sensor.(compare values from these sensors and ECM connector)
  • Black : Ground (Feeds from ECM J2-22) Shared with the same sensors mentioned above
  • White : Signal feeds to ECM connector J2-22
Low pressure will set P1194 error code. Oil rail pressure should be more than 3MPa when cranking

Also check Engine coolant temp sensor and wiring. Engine coolant to manifold temp should not differ by more than 5 deg C either way after 8 hours of no operation. I have found the same symptom on these diesels with fuel supply problems. Operate the priming pump (on top of the fuel filter) until it becomes diffycult to push down before starting or checking anything else.

Posted on Oct 16, 2010

Testimonial: "Thanks Suzman, We actually managed to get it going....The only problem remaining is a rough idle until its warmed up and sometimes stalls until warm. "

stevenhurc
  • 450 Answers

SOURCE: 4jx1 camshaft marks on isuzu trooper 2001 3,0 dohc

the timming gear that the belt runs on has a mark (V cut in gear) to rear cover at about 12 o clock and crank pulley has timming mark for top dead centre, both cams have cut outs in rear that a special tool (camshaft stopper 5-8840-2592-0) locks into to hold cams in correct position, but can do without this, if the cam belt gear is off, the keyway should be at 12 o clock. the marks in the camshaft gears (dots) is for assembly of sissor gears to solid gears on camshafts that run together and they should match up only if you had this appart.

stevenhurc_12.jpg no.1 is timming mark

stevenhurc_13.jpgthis is the locking plate tool

Posted on Apr 24, 2011

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