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Adjust idle speed

WHAT IS IDLE REVS FOR ISUZU DMAX

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 8 Answers

SOURCE: Idle Speed

You cannot adjust the idle speed, it is a fuel-injected model.

Posted on Jul 11, 2008

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emissionwiz
  • 79189 Answers

SOURCE: where is adjustment for idle located in 528

Idle speed is not adjustable, it is controlled by the fuel injection computer, even if you tried to adjust it the computer would over ride any adjustment made by you. I assure you idle speed has negligible affect on fuel consumption

Posted on Sep 08, 2008

mhamlin63
  • 138 Answers

SOURCE: idle speed for my 2002 corolla 4zz-fe engine is low and unevan

Sounds like fuel filter to me. Change that and see.

Posted on Jun 30, 2009

  • 30 Answers

SOURCE: idle problem: motor revs up and down at idle

it sounds like your idle control valve needs cleaning or replacing

Posted on Oct 08, 2009

ginko
  • 19396 Answers

SOURCE: Fast Idle Problem With 99 Isuzu Rodeo V6

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

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