Question about 1998 Isuzu Trooper
Try fitting a seperate transfer pump between the tank and HP pump(quick/cheap fix only) and see if this resolves the problem. If yes check filler cap(no air lock), air leaks in supply hoses or transfer pump(and of course the usual "check the fuel filter").
If not, dig deeper:
J-1-15(not indicated) : Earths glow plug relay to enable glow plug circuit.
ECM : Electronic control module
IS : Idle switch
ECT : Engine coolant temp
OTS : Oil temp sensor
IAT : Intake air temp
FTS : Fuel temp sensor
INJ : Injectors 1 through 4
RPS : Rail pressure sensor
EGR : EGR vacuum pressure
MAP : Inlet manifold pressure
APS : Accellerator position sensor
Posted on Oct 30, 2010
Testimonial: "Many thanks Suzman, Hope you won't mind if we need to pump you for more knowledge.... Very very very helpful.... Regards Johngee10"
I see this old post and im having same problem. But how come in Zambia - Nigeria and such like places you always resolve a problem here in the UK we rely on main dealers to much.
Also wondering if you ever fixed your troopers await a reply
Posted on Apr 20, 2014
Testimonial: "Hi Welsh Warrior, Yes we sorted out that vehicle and several of that type after that one. The answer to your question is simple. In Africa we don't have access to all you have in Wales or wherever, so, necessity being the mother of invention, we're forced to fix things as replacement is usually very expensive. If you're intending to work on your vehicle, or if you'd like to advise your workshop guy's, the following are the areas of interest. 1) crank shaft sensor, 2) camshaft sensor, 3) oil rail pressure sensor (ORPS) and $) the oil rail temperature sensor (ORTS). Problems with these engines are usually caused by using the incorrect engine oil. Use of the specified oil is critical as is a shortened service interval. Also keep in mind that if the injectors have been removed, without marking when removed, or replaced, the injectors will need initialization, meaning re-coding with the engine management system. that particular operation is carried out with the use of a scan tool."
Check Rail oil temperature sensor, it is next to pressure sensor.
It is a thermistor which send signal to ECM from very cold to hot.
If the resistance is high, it is cold, when motor runs, resistance is lover with the temperature and ECM change fuel mixture. Check the wires first for change in voltage, should go lover when warming up. Either way to low, or to high temperature signal and the engine won't run properly. You go to garage it seems no one has any knowledge about that. I had this problem in Australia and "the professionals" asking thousands of dollars to fix it, with no warranty. I paid $12 for extra wire. They couldn't tell why is this problem occur.
Try other sensors as well.
Posted on May 09, 2013
I have the same problem with mine too. Its been down since November 2009. Im in Mongu and if you find someone who can fix it let me know. Mine is a Wizard with 4JX1 engine
Posted on Feb 24, 2011
Testimonial: "Hi Kennedy, If you can get the vehicle trucked to Kitwe, I'm confident we can have you drive it back. Regards John"
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Posted on Jan 02, 2017
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