Question about 1988 Dodge B350

1 Answer

If the battery is unhooked for i5 minutes and the engine needs to relearn how to idle, how will it relearn?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 216 Answers

This is a difficult question to answer in a short manner. The engine uses about a half a dozen sensors to sense how the engine is running.
The throttle positioning sensor tells the computer where the accelerator pedal is, the Map sensor tells the computer how much pressure is in the intake manifold. The MAS ( mass air flow sensor) tells the computer how much air is moving through the intake tube, and the coolant sensors determine engine temp and send this to the computer to aide in idle speed whether it's hot or cold out.
Then you have the 02 sensor which tells the computer how much oxygen is being sent out the exhaust. And lastly the idle air controller, this is what makes the car idle and is influenced buy the other sensors and computer to tell the engine to idle at the factory 700-850 rpm's when warm or 1000-1300 rpm's when extremely cold.
The engine doesn't really relearn it just simply has to read all the sensors again after a reset ( battery disconnect) to go back to the computers default idle speed.
I hope this has in someway explained the way in which the computer and all it's sensors work to help idle the vehicle.

Posted on Aug 07, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I put in another battery in my 2000 dogde truck.now it wont idle on its own.


Robert, You may have to try this relearn procedure.
Warm the engine, but hold your foot on the throttle as necessary to keep the engine running.
  1. With vehicle in Park, slowly release the throttle so that the engine will idle on its own. You may have to work at this a bit.
  2. Let the engine idle on its own for about one minute.
  3. Continue to let the engine idle and with your foot on the brake, place the transmission in Drive and let the engine idle for another minute.
  4. Continue to let the engine idle with your foot on the brake and the transmission in Drive. Turn the A/C on and let the engine idle for another minute with the A/C compressor running.
  5. Turn the ignition off and wait a minute. Check the attached links,
    "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Battery Disconnect or Replacement Problems

https://ca.answers.yahoo.com/question/index?qid=20100517211203AAw91qa

http://www.automotiveforums.com/t454660-click_here_for_instructions_on__quot_how_to_idle_relearn_quot_.html

The Dodge Relearn Procedures eHow

Mar 10, 2016 | Cars & Trucks

1 Answer

How do I do a throttle body replacement relearn on a 04 isuzu ascender


The relearn is done by unhooking the battery for 30-60 minutes. With all HVAC OFF, hook the battery back up and drive your Ascender around for about 40 min or so, at this time, it will relearn. To test it, stop the vehicle put it in park and turn your AC on, if your car doesn't show signs of boggin down or trying to die on you, your relearn was done correctly. This is all assuming that your throttle body is CLEAN!!! If it's not clean, your idle will be bad and engine will try and die on you at idle when your AC or Defroster are on. Relearn should of already been done---> you always disconnect the battery when cleaning the throttle body, as to not to damage the stepper motor that moves the butterfly. To properly clean the throttle body and for best results, always remove the entire throttle body and clean BOTH sides with a sensor safe spray like Seafoam and a rag or nylon brush, you can reuse the hard plastic gasket. Hope this helps!

Oct 12, 2015 | 2004 Isuzu Ascender

2 Answers

How do you perform a idle speed relearn


Unhook the battery for at least 30 minutes. Hook it back up and drive away. After so many drive cycles, it will re-learn the new TB. Same process as when you clean your throttle body.

Aug 01, 2015 | 2006 Chevrolet Trailblazer

3 Answers

2004 TAHOE AFTER BATTERY CHANGE IT STARTS BUT DIES AFTER LETTING FOOT OF THE GAS PEDAL.


when unhooking the battery turn key on all the way to run position and leave that way for about two hours and then turn off and remove key and hook up battery and start engine that procedure drains the backup battery in the computer and makes it relearn back to factory settings basicly reboots

Mar 31, 2015 | 2004 Chevrolet Tahoe

1 Answer

Fast idle


Unhook your battery cable for ten minutes.Reconnect it and let the car idle for five minutes,then drive it normally and it might relearn to idle again at correct speed.This is just something I would try,as it can prove to be a very simple fix. don-ohio (:^)

Nov 15, 2011 | 1997 Pontiac Grand Am

2 Answers

BOUGHT BRAND NEW BATTERY NOW CAR CUTS OFF AND IDLES REALLY LOW


WHEN YOU DISCONNECT THE BATTERY THE ENGINE MANAGEMENT SYSTEMS PCM LOSES IT MEMORY INCLUDING ENGINE IDLING.THE COMPUTER WILL HAVE TO RELEARN THE OPERATING VALUES. IF CAR DOES A LOT OF STALLING AT STOP LIGHTS AND STOP SIGNS. GO BY FORD DEALERSHIP LET THEM REPROGRAM THE PCM.PROBABLY CHARGE YOU $35.00 DOLLARS. TO REPROGRAM PCM.

Jul 04, 2011 | 2006 Ford Five Hundred

1 Answer

I have 1995 V6 Camry and I just changed the battery and it nows Idles at 1500 in park and about 1100 in drive.


when battery was unhooked the computor loose its memory know it will have to relearn the engine ,you migth want reset the computor again but after hooking battery back up drive it for a few miles to relearn the engine .

Dec 28, 2010 | 1995 Toyota Camry

1 Answer

Cranks right up but cuts off immediately unless the gas pedal is pressed


IF YOU RECENTLY UNHOOKED BATTERY OR HAD DEAD BATTERY THE COMPUTER WILL NEED TO RELEARN IDLE STRATEGY,START VEHICLE KEEP IT RUNNING AND DRIVES ON 2OR 3 MILE RUN SHOULD BE SUFFICIENT IF THIS DOESN,T WORK LOOK FOR VACUUM LEAKS IN ENGINE COMPARTMENT OR POSSIBLE BAD IDLE AIR CONTROL LOCATED NEAR THROTTLE BODY

Mar 15, 2010 | 2000 Dodge Durango

1 Answer

Just had timing belt replaced...but now i have a ''ratterling'' from the fan belt area / alternater area..is it connected to the work what was done? loose belt? too tight? help


Due to battery being disconnected while timing belt was replaced, You will need to go through the IDLE RELEARN PROCESS.

In order to make the engine run normal again, you need to take the car through a relearn process. Otherwise the idle could be very slow or have a 30mph idle.

To enable it to relearn, here's what to do.

1) Disconnect the battery cable for 15 minutes, before hooking it back up.

2) (KOEO) Turn the Key On with Engine Off, just so the electronics are on, but without starting the engine and turn the climate control panel to off.

3) Push the off and warmer buttons on the climate control panel at the same time and hold for up to 5 seconds for the computer to go into diagnostics.
On the fuel panel screen it will display 888 then E52 and then 70.
When it gets to 7.0 shut off the key for 1 minute.

4) Repeat step 3, two more times.

5) Start the engine without pushing on the accelerator pedal and let it run for 18 minutes with the climate control panel off.

6) After 18 minutes put your foot on the brake and shift into drive and wait 1 minute.

7) Then turn on the a/c by pushing the auto button. It needs to be warmer than 60 degrees F so the compressor can engage. Wait 1 more minute.

8) Put the shifter back in park and turn the key off.

9) Wait 1 minute

10) Idle relearn is now complete and the engine should start and run correctly.


Sep 16, 2009 | 2003 Kia Rio

2 Answers

Won't idle after replacing battery, engine dies.


Hansandfranz is 1/2 correct; the car does need an "Idle Relearn", but, you do NOT need a scan tool for this. The vehicle just needs to be driven for the ECu to relearn the "base idle".
Get in, drive it down the highway. Do some passing gear downshifts. Pull off to the side of the road, let it idle for 30 seconds, repeat 2 more times. Then, try to duplicate some "in-town" (stop & go") driving, for about 15 minutes.
This will reset the "base idle", and your stalling condition will disappear. Expect to have to do this again if you replace the battery. Very common; the Computer (ECU) loses the base idle parameters when the battery is disconnected. Easily rectified just by driving as mentioned above. Feel free to comment back if you have any other questions.

Oct 16, 2008 | 2002 Toyota Camry

Not finding what you are looking for?
Cars & Trucks Logo

264 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dodge Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Dodge Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...