Welcome Guest ( Log In | Register )

Mitsubishi-Forums.com > Mitsubishi Models > Galant Forum > 7G (1994-1998) Galant
     
Mitsubishi-Forums.com - The UNOFFICIAL Mitsubishi Community This site is NOT affiliated in any way with Mitsubishi or any of it's subsidiaries. Our goal is to provide Mitsubishi owners an information outlet - a means to communicate with other Mitsubishi owners. It is simply a community where fans and owners can get the right information for tuning, customization and general discussions on anything about Mitsubishi. You'll find the answer to almost any question about your Mitsubishi in this site. If not, simply join and ask! We have many willing expert members just waiting to answer your questions.

 
Powered By IP.Board 2.3.6 © 2009  IPS, Inc.
Mitsubishi-Forums.com is not affiliated with or endorsed by Mitsubishi Motors.
 
 Reply to this topicStart new topic

Do you like Mitsubishi-Forums.com? Link to us and help spread the word about our forum. Thanks!
> '98 Galant Unstable, Cycling Idle
rguishard
post Oct 15 2009, 10:04 AM
Post #1


Newbie


Group: Members
Posts: 1
Joined: 14-October 09
Member No.: 79,457
Status: Offline
Location: United States
Drives: 1997 & 1998 Galant
'98 Galant, 141,000 miles. Idle speed unstable. RPM varies cyclically as if searching for equilibrium. OBD error code is 0505, "idle control system malfunction". After start idle varies between 1500 and 2000 every few seconds. When warmed up, cycling idle speed can reach 3000. Did not find any loose vacuum hoses. According to my son, problem appeared with no previous symptoms. Using stethescope, heard IAC stepping motor pulse when ignition key was engaged. Measured resistance of IAC inline connector terminals. Values same as working 1997 Galant. With air intake hose off, throttle plate appeared clean and unobstructed. Any help on likely problem/failed part next step. Thanks.
Go to the top of the page
 
QuoteReply
KiT TeUnG 2549
post Oct 15 2009, 12:24 PM
Post #2


Veteran
*****

Group: Members
Posts: 1,853
Joined: 21-May 08
Member No.: 58,134
Status: Offline
Location: Chiang Mai , Chiang Mai ,TH
Drives: 1997 Mitsubishi Diamante VR-S SUPER INVECS II , 1990 Mitsubishi Galant VR4 MR, 2006 Mitsubishi Triton PLUS 3.5 DOCH , 2001 Mitsubishi Galant GSR
There likely an issue with the IAC , it is a common issue.
Go to the top of the page
 
QuoteReply
  Advanced Search
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

Reply to this topicStart new topic
Get your Mitsubishi listed in the Garage Today, for FREE, to share with the world what you drive and what toys and modifications you have.

Collapse

> Similar Topics

  Topic Replies Topic Starter Views Last Action
No New Posts Idle Problem
 2 Az3g 87 4th November 2009 - 03:41 PM
Last post by: Az3g
No New Posts Idle Problem
 10 Az3g 121 3rd November 2009 - 11:26 PM
Last post by: Az3g
No New Posts Idle Adjustment
 3 bumpn 96 1st November 2009 - 12:36 PM
Last post by: bumpn
No New Posts Idle Problem
 2 Primemitsubishi 82 15th October 2009 - 04:52 AM
Last post by: Primemitsubishi
No New Posts Idle Speed For My Magna 98 V6 3.0
Some questions
 1 alpha_ai 40 4th October 2009 - 01:20 PM
Last post by: KiT TeUnG 2549

 
 
 
Time is now: 21st November 2009 - 09:50 PM
(c) 2004 Mitsubishi-Forums. All rights reserved.
Mitsubishi-Forums.com is not affiliated with or endorsed by Mitsubishi Motors.
Privacy Statement