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Holden 3.5 rodeo the problem is not unlike the feeling of being on cruise control as low as 20kph, unless I lift off the accelerator the car will stay at the same revs ?

There are no warning lights or computer codes showing any faults!

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  • Cars & Trucks Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Nov 04, 2012

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Posted on Jan 02, 2017

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Bloomingidoi
  • 49 Answers

SOURCE: Multable light warnings

If you hav'nt replaced the cumputer yet; try replacing the egr valve first; sounds strange,but has worked for me.

Posted on Nov 22, 2008

  • 1 Answer

SOURCE: Cruise Control not active, engine light and ABS light

I have the same problem with the Cruise Control not available coming up but I had a smiliar problem with the ABS and Engine light coming on when battery was pretty much dead, it was hard to steer and brake.. may be something different with your car..

Posted on May 27, 2009

  • 750 Answers

SOURCE: Holden rodeo 99 3.2v6 4l30e code 82 and going into limp mode

the tcm may be faulty or has a loose ground, try swaping in another if you can get one borrowed or a cheap used one from a salvage unit

Posted on Oct 30, 2009

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

  • 39 Answers

SOURCE: 1998 Rodeo TF Series 2WD 5-speed manual

check throttle positioning sensor or mass air flow (maf) sensor

Posted on Nov 21, 2011

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Cruise Control
Any given speed above approximately 22 mph (35 km/h) can be maintained with the cruise control by operating the lever.
-see photo

  1. Accelerate and set: Lift lever briefly to set speed. Hold lever up to accelerate.
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To cancel the cruise control, briefly push lever to position 3.
When you step on the brake or the vehicle speed drops below approx. 22 rnph (35 km/h), for example when driving upgrade, the cruise control will be canceled.
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If the lever is briefly pushed to position 4 when driving at a speed exceeding approx. 22 mph (35 km/h), the vehicle resumes the speed which was set prior to the cancellation of the cruise control. The last memorized speed is canceled when the key in the steering lock is turned to position 1 or 0.
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If the engine does not brake the vehicle sufficiently while driving on a downgrade, the speed you set on the cruise control may be exceeded and you may have to step on the brake pedal to slow down.
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set-cruise-control-1994-mercedes-c220-sufrpujyrsap3pvz3w2boz5j-3-0.jpg
http://www.benzworld.org/forums/attachments/w202-c36-c43/153145d1197313761-pdf-owners-manual-w202-1995-2000-1999-c280_owners_manual.pdf

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I can explain the sluggishness you get after the fault occurs and the light appears. The rodeo will go into what's called 'limp home mode' when it detects a fault. It is a safety feature that locks the car in second (or third) gear so u can get home or to the mechanic...slowly. If you turn the car off and re-start it will re-set. I recently was having transmission problems with my 2002 v6. It would occasionally clunk badly when pulling up to a slow stop. Intermittent problem that I couldn't reproduce with the mechanic (of course). They changed the transmission oil which was low and old, not a cheap job but probably a good idea. Unfortunately problem was still there. Plug in diagnostic module at transmission specialist showed no current faults when they first checked it, but a look through the fault history when I took it back and told them problem was still there showed a fault with the TPS or Throttle Position Sensor. Replaced that (not very expensive) and its been perfect ever since. May not be your problem, but get the transmission guy to check fault history, not just current faults. Don't know why my guy didn't do it the first time. Best of luck

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