Question about 2001 Isuzu Trooper

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Heavy white smoke coming and it revs up by itself

Its a 4jx1 engine and ive changed the 4 injectors with the o ring and the sleeves i started the engine the idle was a bit rough and i give acceleration theres a lot black smoke coming out so i used it instead and it took me about a month when the car was going weaker and weaker and thats when the white smoke start coming and it revs up.

Posted by Anonymous on

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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simontricket

Simon

  • 235 Answers

SOURCE: White smoke and pressure in radiator.

Any sign of diesel in the water ? sounds like head gasket to me and the engine will rebuild ok but have the dealer put in new injector tube sleeves and O seals .

Posted on Apr 20, 2009

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Anonymous

  • 1 Answer

SOURCE: Engine runs wild with white smoke

engine turns over but wont fire

Posted on Sep 04, 2009

ginko

Ginko

  • 19396 Answers

SOURCE: 2001 Isuzu Rodeo 54248 miles

Hi.

If problem is only on startup and when idleing, then the problem is likely IAC system, also a vacuum leak will cause the same problem.

If problem is not only on startup and idle, but also when driving, then MAP sensor and EGR system must be checked.

Check also accelerator cable state and setting.


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The first thing to do is pulling out the OBDII fault codes stored in the ECM. This is done connecting a code reader to the ECM diagnostic port. The job can be done for a small fee at any local garage, and it is done for free at AutoZone.

The codes will help locating the problem.

About possible faults:

Problem is stalling when idling and during startup, but engine idling fast all the time. Problem not starting at times it is due to the fact that the wrong mixture is being sprayed, this is probably causing flooding and misfire. Since the CEL is on, one of the codes returned is probably misfire.

Check accelerator.

Check IAC system. This is composed by a valve and a solenoid that check and control amount of extra air air when the engine is idling. The IAC valve is located on top of the throttle body.

Check the vacuum system and try cranking with gas tank cap off. Vacuum system is tested using an hand tool gauge onvacuum lines while spraying card cleaner on the hoses (or heating them with a torch). If there is a leak, pressure will go up. A big leak will also do hissing noise, and will often result in a lean code when doing an OBD code scanning.

This kind of symptoms can also be caused by weak wiring to MAP/MAF sensor (MAP in this engine).

If the car also drives very rough and is revving up and down in a weird way, check the EGR valve.

As first thing I would do a code scanning. This car is OBDII. The scan can be done for free at the nearest Autozone, or for a small fee at any garage.

If you get any OBDII code from the scan, report it here, so that we can individuate the possible reason for the problem.

If you repute my solution helpful, then please take some times to accept the solution. Providing good repair tips requires time and skills, and your feedback is important for us.

Regards.

Ginko.

Posted on Oct 26, 2010

SOURCE: Isuzu trooper 2003, skyroof version, 4jx engine.

If you are sure that the engine oil is coming into the combustion chamber, then you have to overhaul the engine. After the overhaul is done, have it calibrated and and clean the exhaust pipe to get rid of the black smoke. And! remember, for diesel engines a big black smoke will always come out the exhaust if you suddenly step on the gas too deep and then over-revving it. (I mean always, that's why roadside emissions people are so stupid when stepping on the gas, they always step on it suddenly and over-rev it, it's a sure fail)

Posted on Jan 22, 2011

willsolveit

  • 67 Answers

SOURCE: Don't start after oil change

4 jx1 motor stop running after oil change. Flush engin and and get it started for short while, flush it again and run for 5min. Change the oil (5w30) and dont start. Clean the injectors in ultrasonic bath and got it running for 3 min. Now its dead, look like a funeral.

Posted on Apr 25, 2011

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Date: November 18, 2004
TECHNICAL
Subject:
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Any sign of diesel in the water ? sounds like head gasket to me and the engine will rebuild ok but have the dealer put in new injector tube sleeves and O seals .

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