Question about 2000 Saturn SL

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Engine idles at 2400 rpm:

My 1.9 liter SOC engine idle too high, at 2400 rpm. I replace the idler control value, as well as clean the throttle assemby and throttle body (both were caked with carbon). Still have the problem...could it be a vaccum line?

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  • Anonymous Jan 19, 2009

    My 2000 Saturn SL1 runs with a high idle after the car runs for a while. Sometimes it will idle down but most of the time if is around 2000 rpms

  • Rick Byrd
    Rick Byrd May 11, 2010

    vacuum leak , yes , quite possible , is the check engine light on ? did the instructions for the idle control valve mention to reset the adaptive values after installing it , (disconnect battery cable if you don't have a scanner) . a vacuum leak might be easily found with a can of brake cleaner , while spraying around the intake and throttle body , vacuum lines, you might hear it and sense the idle change when you hit the right spot .

    J5


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You sucking air somewhere!

Posted on Jan 28, 2009

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What is relearn predcudre for idle on 08 chev. 1500 5.3 eng.


Throttle Learn
Description
The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.
A vehicle that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to learn out the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.
The idle may be unstable or a DTC may set if the learned values do not match the actual airflow. Without Scan Tool - Learn Procedure
• DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0222, P0223, P0300, P0351, P0352, P0353, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
• The engine speed is between 450-4,000 RPM.
• The manifold absolute pressure (MAP) is greater than 5 kPa.
• The mass air flow (MAF) is greater than 2 g/s.
• The ignition 1 voltage is greater than 10 volts. Without Scan Tool - Learn Procedure
Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle.
Start and idle the engine in PARK for 3 minutes.

The ECM will start to learn the new idle cells and Desired RPM should start to decrease.
Ignition OFF for 60 seconds.
Start and idle the engine in PARK for 3 minutes.
After the 3 minute run time the engine should be idling normal.
Important: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn.
? If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
After the drive cycle, the engine should be idling normally.
? If the engine idle speed has not been learned, turn OFF the ignition for 60 seconds and repeat step 6.
Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Dec 18, 2016 | Cars & Trucks

2 Answers

How can I fix high idle?


In theory once the desired idle speed is programmed into the management system, in the absence of such faults as air leaks, sticking idle air control valve and suchlike it should be impossible for the idle speed to be much different from the programmed value because the ECU should continue closing down the amount of air bypassing the throttle butterfly until the idle is around the correct value.

I think you need to go back to basics and double-check the work to ensure everything is as it should be. In the absence of mechanical faults and ignoring the possibility of electronic problems a high idle must be caused by too much air entering the engine, either because the idle air control valve is not closing properly or because the throttle butterfly is not closing fully.

It is worth noting air can enter the intake through leaky diaphragms, split vacuum hoses or faulty pcv systems. It is also worth checking the egr valve if fitted.

Jan 24, 2016 | 2006 Chevrolet Cobalt SS

1 Answer

Correct code P0504?


What Colorado do you have ? 2 wheel or 4 wheel drive ? Sport ,sport LS 3.5L , Z71, Z71 LS. etc. what size engine ? an does it have electronic throttle control ? I have factory service info an it is not showing that code .
DTC P0506

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0506 Idle Speed Low
DTC P0507

Circuit Description

The throttle actuator control (TAC) motor is controlled by the powertrain control module (PCM). The DC motor located in the throttle body drives the throttle plate. In order to decrease idle speed, the PCM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the PCM commands the throttle plate open allowing more air to pass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High
Cleaning the throttle body mite take care of it !
Cleaning Cleaning An Electronic Throttle Body Safely

Jan 31, 2015 | 2005 Chevrolet Colorado

2 Answers

Code p0507


possible causes are:

Dirty throttle body
Electric throttle control actuator incorrectly adjusted/faulty/damaged
Air leak on Intake
Poor electrical connection to the Intake Air Control valve

P0507 KIA Idle Air Control IAC System RPM Higher Than Expected

May 14, 2014 | 2003 Kia Sedona

1 Answer

Vibrations during idling


which engine.??? never post lacking engine ,here is why.
1.3 L G13B I4
1.5 L G15A I4
1.6 L G16B I4
1.8 L J18A I4
1.8 L BP-ZE I4
1.9 L XUD9 diesel I4

Ill answer in the generic and for GAS engines. only.
that is illegal RPM, the ECU regulates it to 800 all the time
that means the ECU can not regulate the RPM now, for many reasons.
and sure it vibrates too low, that is normal for all 4cylinders to do that.
no bad engine mounts never lower RPM to 600, ever.
they dont control idle speed at all.
the #1 reason for most cars to idle too low are:
1: EGR leaks, (clean it)
2: ISC stuck closed (electric idle speed acututor dirty) clean it.
3: gross misfiring , caused by bad spark or bad fuel mix.
4: low compression on 1 or more cylinders (real low) Do compression test at WOT. throttle.



Apr 19, 2014 | 1997 Suzuki Baleno

1 Answer

The car rpm idil real high and wont stay staberlized


Hm first thing you may want to consider when this problem happens is that there may be a vacuum hose disconnected, which will cause a rough idle. If you hear an unusual hissing noise from the engine then get a bottle of throttle body cleaner and spray the area you are hearing the noise from. If there indeed is a leak when the spray hits that area it will surge. A reminder the vehicle must be on when you are doing this test. Next would be the Idler Control Module which is connected to your throttle body, it controls what Idle you vehicle is at when you are at a stop or while coasting. They can get carbon build up usually require cleaning during every 50 thousand miles. Another cause of a high rpm may be related with sensors. An Air Mass Sensor or Mass Air Flow sensor may be full of carbon, which will cause them to malfunction. They tell the computer on the car how much air is coming into the intake so the computer can determine how much fuel to spray in for combustion. My guess out of all this would turn to the Idler Control Module, which you can clean if you know its location and have some tools around.

Hope this Helps!

Jun 02, 2011 | Hyundai Accent Cars & Trucks

1 Answer

The engine is idling high around 2500 rpm, I have already replaced the idler air control valve. No vacuum leaks are present.


There will be a vacuum leak around the base of the throttle body gasket. You can confirm this by spraying carb cleaner around it's base. You should remove the throttle body, clean it thoroughly and replace the gasket. If you would like to really check, you can get a scan tool and monitor IAC counts. If the engine is still idling high and the counts read "0" on a warm engine, this means that the computer is trying as hard as it can to block all idle air, so it must be coming in somewhere. Possibly the throttle valve? has anyone been playing with the factory setting on the minimum idle screw?

Jan 16, 2011 | 1995 GMC Jimmy

3 Answers

My 2005 altima idles high and engine code


This P0507 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0507 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is greater than the desired (pre-programmed) RPM. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set.

Jun 07, 2010 | 2005 Nissan Altima

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