ECU & Electronics Discuss electronics and related components within.

LOW ENGINE IDLE after NEW BATTERY

  #1  
Old 05-18-2016, 03:09 PM
Junior Member
Thread Starter
Join Date: May 2016
Posts: 2
Default LOW ENGINE IDLE after NEW BATTERY

Hi All,

Car is a 4 cyl. 2007 Camry with 150,000 miles, original owner

I replaced the battery and the engine idle went from a reasonable 650 to 450 rpm's. That was the only change, smooth idle before, smooth after but a 200 rpm drop.

The engine is surprisingly smooth at 450 rpms but the low idle speed makes it less smooth on take off from stop.

Right after the battery was installed one of the radio functions was backwards, AUX and CD were reversed, soon after it went back to normal.

Is there a way to reset the computer to stock, something makes me think this is the problem.

Please help

john
 
  #2  
Old 05-18-2016, 06:14 PM
Senior Member
Join Date: Jan 2014
Location: Ipswich QLD australia
Posts: 543
Default

have not come across this problem from replacing a battery
low rpm... radio functions backwards ?

did you ever jump start the camry
using all battery terminals and not clamping earth to the engine of the camry

if everything in the camry was working what was reason for replacing the battery

check the alternator regulator specs
 
  #3  
Old 05-18-2016, 07:40 PM
Junior Member
Thread Starter
Join Date: May 2016
Posts: 2
Default

Thanks dirty hands,

The battery was over 5 years old, was cranking slowly, we live in a rural area and were being conservative replacing battery. engine cranks like new with replacement battery.

As original owner can say engine was never jump started.
 
  #4  
Old 05-18-2016, 11:20 PM
Senior Member
Join Date: Jan 2014
Location: Ipswich QLD australia
Posts: 543
Default

my thought is
the idle air control solenoid

try to clean the maf and throttle body check the air cleaner

radio... I have no answer

can rule out ECU . it wouldnt run at all


Name:  idle%20valve%20.jpg
Views: 3203
Size:  74.0 KB
 

Last edited by dirty hands; 05-19-2016 at 04:24 PM.
  #5  
Old 05-19-2016, 11:26 AM
Super Moderator
Join Date: Jan 2008
Location: PTW
Posts: 11,742
Default

The cars radio and engine/trans computer settings are maintained by 12v power from the battery when the engine is off.

The radio settings appear to have reset themselves.

The engine idle speed is controlled by computer via an electric throttle. The computer will need to learn the proper idle speed and reset it, which will happen when driving.

For now wait wait and determine if the idle resets itself. Don't start looking to fix things that may not be broken.

There a a few posts on your situation in the Similar Threads section below.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jkah
New Member Area
1
10-28-2014 07:43 PM
raggedyman
General Tech
2
06-30-2014 05:22 PM
hardyrxp
Engine & Internal
7
02-08-2011 06:07 AM
iamtfc
Engine & Internal
1
01-16-2009 07:07 PM


Thread Tools
Search this Thread
Quick Reply: LOW ENGINE IDLE after NEW BATTERY


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.