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How do I get the engine to idle down?

After I sodered a new capacitor into the ECM, the engine will not idle down

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Have you tried disconnecting the battery and touching the two cabled together. Why did you replace the capacitor?

Posted on Dec 27, 2014

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Hi there,
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Posted on Jan 02, 2017

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Cannot get my 2009 colorado into program mode to set tps sensor


What engine ? Are you talking about Throttle Learn ? Did you replace throttle body ?
The engine control module (ECM) learns the idle position of the throttle plate 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.

Throttle Learn
With Scan Tool-Reset
Ignition ON, engine OFF. With a scan tool, perform the Idle Learn Reset in Module Setup.
Start the engine, monitor the TB Idle Airflow Compensation parameter. The TB Idle Airflow Compensation parameter value should equal 0 percent and the engine should be idling at a normal idle speed.
? If the engine is not idling normally, proceed with the Learn portion of the diagnostic.
Clear the DTCs and return to the diagnostic that referred you here.

May 16, 2017 | Cars & Trucks

1 Answer

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

1 Answer

I hooked my 95 Mazda mil up and says I need O2 sensor for bank 1 and 2 and also says I need engine speed circuit not sure wat to replace and wats really messd up please help


First is all always write down the codes you have present, it helps in closing down on the problem. I am assuming you have a 95 Mazda Milleinia

1. Start and run the engine and monitor the oxygen sensor signals and see if this sensor has bad readings still. Check for an open or shorted wire between the sensor and the Engine Control Module (ECM) if the signal is dropping out.

2. Listen for an exhaust leak in the area of the oxygen sensor, the leak could allow oxygen in to the exhaust and skew the sensor readings.

3. Inspect the ECM and ECM connector for signs of something that has been spilled on the ECM. Is the engine idling too high or too low then check this:-
1. Unplug the idle air control valve and turn the air bypass screw in to see if it will idle down. If it will idle down, adjust the idle speed to around 500 RPM's and then plug the idle air control valve back in.

2. If it still idles high, remove the air boot from the throttle body, block the air bypass ports with duct tape, hook the air boot back on and start it. This should make it not idle at all or just barley idle. If it does, the problem is in the idle air control valve.

3. If blocking the air ports doesn't cause it to idle down, the throttle plate must be sticking open. Clean the throttle plate really good and back the throttle stop screw off and then see if it idles down.

4. Verify the coolant level is not low and that coolant is circulating through the idle air control valve. Tech Tips: This idle air control valve is two valves in one. It is a fast idle thermo valve on one side and a duty cycle idle air control valve on the other.

I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede

Mar 30, 2015 | 1995 Mazda Millenia

1 Answer

I have a 2005 chevy aveo. The car was running when I touched the wires on the o2 sensor with the metal cover over the exhaust manifold. I was trying to take it off. The wires sparked and the car shut off....


The following service procedures require either a programming or a setup event performed for a complete repair.
ECM Replacement
Important: It is not necessary to program a new engine control module (ECM). The ECM is programmed from the factory. Ensure the new ECM is equipped with the latest software/calibration.
If the engine control module (ECM) is replaced, the following procedures must be performed:
Idle Learn Procedure--Refer to the appropriate procedure:
• Idle Learn for the 1.4L DOHC engine
• Idle Learn for the 1.4L SOHC engine
• Idle Learn for the 1.6L engine
The crankshaft position (CKP) System Variation Learn Procedure-- Refer to the appropriate procedure:
• Crankshaft Position System Variation Learn for the 1.4L DOHC engine
• Crankshaft Position System Variation Learn for the 1.4L SOHC engine
• Crankshaft Position System Variation Learn for the 1.5L engine
• Crankshaft Position System Variation Learn for the 1.6L engine
Theft Deterrent--Refer to Programming Theft Deterrent System Components . The ECM will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. An ECM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password, and will require a learn procedure after programming to learn the current vehicle's password.

Dec 16, 2014 | 2005 Chevrolet Aveo

1 Answer

Truck dies when idling


HI
first I would like to tell you, do this procedure only if the 5th digit of your VIN is C or K.

Description

The engine control module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may set if the throttle position is not learned.

Conditions for Running the Throttle Learn Procedure

• DTCs P0101, P0102, P0103, P0107, P0108, P0111, P0112, P0113, P0506, and P0507 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.

Throttle Learn

Important: Do NOT perform this procedure if DTCs are set. Refer to Diagnostic Trouble Code

(DTC) List - Vehicle.

1. Start and idle the engine in PARK for 3 minutes.

2. With a scan tool, monitor desired and actual RPM.

3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease.

4. Ignition OFF for 60 seconds.

5. Start and idle the engine in PARK for 3 minutes.

6. 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.

7. 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.
8. Once the engine speed has returned to normal, clear DTCs.
Good Luck

Mar 04, 2014 | 1995 GMC Sierra

1 Answer

Have a 89 s10 2.5 starts fine idles good for about 2-3 min then idle is erratic revs up good has good power but exhast manifold glows red does this with or with out exhaust /converter on have installe


This series of S10 is notorious for cracking the original circuit board (often called a "half board") of the ECM unit, which is found behind the glove box. A cracked "half board" can cause a wide variety of intermittent drive-ability problems. It took GM's Powertrain engineers a long time to ID this pesky problem, shortly after this ECM was introduced. If you can not find another cause, a new ECM is your likely fix.

Feb 13, 2012 | Chevrolet S 10 Cars & Trucks

1 Answer

My lexus sat for about 3 months and i tried to start it with a battery charger and it will start but wont idel


Hi there,

Erratric idle is normal, after the battery has been flat for some time.

Your vehicle's ECM monitors many emmission sensors and stores their appropriate data parameters. When the ECM loses power (i.e. the battery goes flat or is disconnected), all sensor data is lost, so the ECM then reverts to factory parameters, until the ECM re-learns new engine sensor parameters.

If you can get the engine started and leave engine idling for approx. 15 minutes (for engine to reach operating temperature), then take for another 15 minute drive (city driving is best), this should be sufficient for the ECM to re-learn new parameters and stabilise the idling.

If the engine still will not idle correctly, then have the OBD fault codes read from your vehicle's ECM - this will quickly identify the suspected circuit causing this condition.


Hope this helps............

Oct 31, 2011 | 1992 Lexus Es 300

1 Answer

I have a 1990 exel gls with a 1.5 4 cylinder port fuel injected. The original ecm would no longer run the engine, but will still comunicate with my scanner. I have tried 2 different ecm's which will run...


Heres a TiP for ECM malfunction!
Replace all the CAPACiTOR inside ur OLD ecm, 'cause thats the part of the circuit that breaks down!
I have repaired a LOT of ECM, and it works!
Try that if u couldn't get a NEW one!

Dec 01, 2010 | Hyundai Excel Cars & Trucks

1 Answer

ECM switches from closed loop to open loop at idle after warmup


WHEN ENGINE GOES CLOSED LOOP TO OPEN LOOP.YOU HAVE A RICH FUEL MIXTURE.YOU HAVE A VACUUM LEAK.BY YOU HAVING ROUGH IDLING.AND A HIGH MILEAGE ENGINE I WOULD DO A COMPRESSION TEST OR CYLINDER LEAK DOWN. CHECK FOR LEAKING VALVES AND LOW COMPRESSION .THEY BOTH WILL CAUSE ENGINE TO IDLE ROUGH CAUSE MISFIRE.CAUSE OPEN LOOP CONTAMINATE HO2 SENSOR CAUSE A RICH FUEL MIXTURE.

Sep 30, 2009 | 1984 Oldsmobile Delta 88

2 Answers

2000 Jeep Wrangler 4.0L ECM replacement


well you wont need to change the ecm if its not burt yet.
try correcting the short first before you do burn out the comp.
if this is the model with the in line coil pack you will need to make sure the heater hoses are not drooping down on the pack.use wire straps to raise the heater hoses just off the pack.you may want to remove the pack and put some dielectric lube on the spark plug boots so it goes down all the way on the spark plug.when the plug miss fires and causes the engine to stumble the comp raises the idle to compesate.then the plug fires again and the idle surges.
hope this helps
jm

Jun 22, 2009 | 2000 Jeep Wrangler

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