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2001 Honda Accord Alternator problem

Tiny
BORDOM
  • MEMBER
  • 2001 HONDA ACCORD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
Hello, ive been told by a non mechanic my alternator is causing my idle to go up and down on my rpm. Sometimes my car would take a while to start after 3-5weeks of non start. Also my idle on drive transmission is below normal idle. It has been a known issue for the last 3years and if it the battery is dieing how could it last 3years long.
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Monday, April 6th, 2009 AT 5:22 PM

6 Replies

Tiny
F4I_GUY
  • MECHANIC
  • 3,302 POSTS
It's not your alternator that is causing this (well it's very un-likely)

What you most likely have is either a dirty throttle body that is in need of a service or a dirty IACV motor (idle air control valve).

First thing I would do is have a good throttle body service done that will clean out all idle ports and the throttle body.
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Monday, April 6th, 2009 AT 6:43 PM
Tiny
BORDOM
  • MEMBER
  • 4 POSTS
Sometimes it would not start after long periods of not driving say like 4-8weeks. You sure it is not the ECU. There is some type of code that the mechanic has told me about to replace.
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Wednesday, April 8th, 2009 AT 12:09 PM
Tiny
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  • MECHANIC
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There's a code?

Do you mind retrieving the DTC and posting it up please.

And I cannot say for sure that it is not your ECU, however, from the symptoms you described it does not sound like something that is the ECU's fault.
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Wednesday, April 8th, 2009 AT 5:14 PM
Tiny
BORDOM
  • MEMBER
  • 4 POSTS
Computers and Control Systems
Code P1106
DTC P1106: BARO Sensor Range/Performance Problem

The BARO sensor is inside the PCM/ECM. It converts atmospheric pressure into a voltage signal that modifies the basic duration of the fuel injection discharge.

Thats what the paper says. This was about 3years ago. About 1 year ago I had to recharge my car with my brothers SUV and it started up good again for about a few months but after that the idle started to get sluggish. Ever time I make a stop at a light the rpm goes below idle and goes back up but stays below and near normal idle.
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Wednesday, April 8th, 2009 AT 6:19 PM
Tiny
BORDOM
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  • 4 POSTS
Ok I cleaned the throttle body with a special spray and engine is running far better with little or no rough idle. Where is the IACV motor located?

Thanks
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Friday, April 10th, 2009 AT 8:36 PM
Tiny
F4I_GUY
  • MECHANIC
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IACV is located at the back of the intake manifold on most hondas. It will have two 12mm bolts holding it in and 2 coolant hoses running to it.

They usually look like this.


https://www.2carpros.com/forum/automotive_pictures/276698_iacv_picture_2.jpg

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Sunday, April 12th, 2009 AT 11:06 AM

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