Welcome Guest ( Log In | Register )

Mitsubishi-Forums.com > Mitsubishi Models > Eclipse Forum > 1G/2G (1990-1999) Eclipse
     
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!
> 2.0l Irratic Idle 1200 To 1700 Rmp Surges
HiZ
post Feb 25 2006, 12:19 AM
Post #1


Newbie


Group: Members
Posts: 9
Joined: 11-February 06
Member No.: 21,064
Status: Offline
Location: wisCONsin
Drives: 92 eclipse GS
Hello and I have a 92 Gen 1 non turbo 2.0L

the car runs fine accept that it surges in rmp and will not idle
this does it all the time.
When it first starts up it stays at 2500+ rpm for about 30 sec to 2 min
then it will calm down for a few seconds and then it surges up and down
ohh...uhhh...ohhhh....uhhhh
up and down
1200 to 1700 Rpm
it also has a slight miss when it is idling normal, something that happens very infrequently
So, I have checked the wires, also torn the intakeapart, Throttle body; the vac lines on the top are all clean. The IAC motor was apart and is clean and I do not think that the EGR has an effect. If so let me know, however this is used at higher RPM and I have not touched it.
I know that intake gaskets are a problem however that is typical at normal op temps.
Let me know what you think
Go to the top of the page
 
QuoteReply
utiheadbanger
post Feb 25 2006, 12:34 AM
Post #2


Nissan Tech
*****

Group: Moderator Emeritus
Posts: 1,984
Joined: 18-July 05
Member No.: 12,629
Status: Offline
Location: Bartlett, IL
Drives: 2003 Mitsubishi Lancer ES
Check your coolant temp sensor. If your car never senses closed loop, it will keep the RPMs up to enrich the air/fuel mixture to warm the car up.
Go to the top of the page
 
QuoteReply
4G63Attack
post Feb 25 2006, 03:42 AM
Post #3


The Green Hell
Group Icon

Group: Moderator
Posts: 4,167
Joined: 12-March 05
Member No.: 7,500
Status: Offline
Location: SoCal
Drives: 1G GSX
QUOTE(HiZ @ Feb 24 2006, 09:19 PM)
Hello and  I have a 92 Gen 1 non turbo 2.0L

the car runs fine accept that it surges in rmp and will not idle
this does it all the time.
When it first starts up it stays at 2500+ rpm for about 30 sec to 2 min
then it will calm down for a few seconds and then it surges up and down
ohh...uhhh...ohhhh....uhhhh
up and down
1200 to 1700 Rpm
it also has a slight miss when it is idling normal, something that happens very infrequently
So, I have checked the wires, also torn the intakeapart, Throttle body; the vac lines on the top are all clean. The IAC motor was apart and is clean and I do not think that the EGR has an effect. If so let me know, however this is used at higher RPM and I have not touched it.
I know that intake gaskets are a problem however that is typical at normal op temps.
Let me know what you think
[right][snapback]46583[/snapback][/right]


surges up and down and up and down like a yo-yo ? pretty sure it is the IAC (ISC) you can do a test on it. just take it out and plug it in and start up your car. by doing so have some one hold the sensor and see if its moving in and out went you try to start your car.
Go to the top of the page
 
QuoteReply
streetprojects
post Feb 26 2006, 07:50 PM
Post #4


Newbie


Group: Members
Posts: 3
Joined: 26-February 06
Member No.: 21,645
Status: Offline
Location: san diego
Drives: none
If it runs fine then its probably not the compression, but I would test it anyways.
Go to the top of the page
 
QuoteReply
Dsmx17
post Feb 26 2006, 09:17 PM
Post #5


Newbie


Group: Members
Posts: 20
Joined: 24-November 05
Member No.: 17,881
Status: Offline
Location: Virginia
Drives: 98'gsx, 94'civic, 92'Tsi
that sounds like the biss (base idle set screw) is out of wack, you need to ground out teo connectors, one on the firewall near the battery (it just hangs there connected to nothing) the other on the diagnostics plug on the fuse box, I can illustrate the plugs on here but you can find them on www.vfaq.com

enjoy!

oh almost forgot, after you ground the plugs you have to adjust the biss screw, you turn it in to lower, or out (counter clockwise) to raise the base idle, that should fix it.
Go to the top of the page
 
QuoteReply
HiZ
post Mar 2 2006, 12:25 AM
Post #6


Newbie


Group: Members
Posts: 9
Joined: 11-February 06
Member No.: 21,064
Status: Offline
Location: wisCONsin
Drives: 92 eclipse GS
Compression is good! Thanks
Go to the top of the page
 
QuoteReply
HiZ
post Mar 2 2006, 12:26 AM
Post #7


Newbie


Group: Members
Posts: 9
Joined: 11-February 06
Member No.: 21,064
Status: Offline
Location: wisCONsin
Drives: 92 eclipse GS
Thanks on this tip I actually did this and the results were nothing



that sounds like the biss (base idle set screw) is out of wack, you need to ground out teo connectors, one on the firewall near the battery (it just hangs there connected to nothing) the other on the diagnostics plug on the fuse box, I can illustrate the plugs on here but you can find them on www.vfaq.com

enjoy!
Go to the top of the page
 
QuoteReply
HiZ
post Mar 2 2006, 12:29 AM
Post #8


Newbie


Group: Members
Posts: 9
Joined: 11-February 06
Member No.: 21,064
Status: Offline
Location: wisCONsin
Drives: 92 eclipse GS
QUOTE(utiheadbanger @ Feb 25 2006, 01:34 AM)
Check your coolant temp sensor.  If your car never senses closed loop, it will keep the RPMs up to enrich the air/fuel mixture to warm the car up.
[right][snapback]46587[/snapback][/right]



Do you have an idea on how to test the coolant temp sensor, what resistance it should be at?
Go to the top of the page
 
QuoteReply
HiZ
post Mar 2 2006, 12:30 AM
Post #9


Newbie


Group: Members
Posts: 9
Joined: 11-February 06
Member No.: 21,064
Status: Offline
Location: wisCONsin
Drives: 92 eclipse GS
QUOTE(4G63Attack @ Feb 25 2006, 04:42 AM)
surges up and down and up and down like a yo-yo ? pretty sure it is the IAC (ISC) you can do a test on it. just take it out and plug it in and start up your car. by doing so have some one hold the sensor and see if its moving in and out went you try to start your car.
[right][snapback]46601[/snapback][/right]



w/o taking out the sensor I unplug it and nothing happens, just surges.

When does the IAC kick in?
What is the primary function?
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 Tons Of Starion Parts In Md...
 2 seeker 93 4th January 2009 - 05:21 PM
Last post by: WildWes1g
No New Posts Toluene For Better Boost
 5 BishiBrown 82 30th December 2008 - 02:26 PM
Last post by: bryan_root
No New Posts Idler Pulley Belt Break?
WTF
 5 Boosted_talon 42 30th December 2008 - 12:49 PM
Last post by: pwee05
No New Posts Top Gear Season 12 Episode 4 - Bugatti Veyron - Pagani Zonda F Roadster
 7 trev0006 114 15th December 2008 - 10:25 PM
Last post by: BulletMagnet
No New Posts Torque Specs
Anyone got them?
 3 dwinchell87 131 10th December 2008 - 10:49 AM
Last post by: kraig

 
 
 
Time is now: 6th January 2009 - 04:52 AM
(c) 2004 Mitsubishi-Forums. All rights reserved.
Mitsubishi-Forums.com is not affiliated with or endorsed by Mitsubishi Motors.