Honda Car Forum


Go Back   Honda Car Forum - Accord Parts Civic Tuning Acura Racing > Discussion > Honda Technical

LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 29 Nov 2009, 06:01 am
Junior Member
Join Date: Nov 2009
Posts: 4
Default 89 Honda Accord lxi Idles Up And Down?

Hi My Honda Idles Up And Down After Warming Up I Put A New Throttle Body On It. And There No Vac..leak It Gots New Plugs But It Still Idles Up An Down But If I Unplug My o2 sensor's It Stay Idling A little High But Not Up And Down..........Help Me Thanks

Hey I call The Garage and He said the o2 could cause it to do that but my i.a.c.v. is a new on but an sure if i want to take it back off but any info helps

it is the original oxygen sensor
Reply With Quote
  #2 (permalink)  
Old 29 Nov 2009, 06:16 am
Senior Member
Join Date: Aug 2007
Posts: 1,032

Very good information - it appears the engine computer is searching for the right mixture but can't find it. Unplugging the O2 sensor stops the confusion.

I have a hunch the O2 sensor is the original, and they get pretty ragged after 100K miles. The sensor will be seriously overdue for replacement if it is original - pre-1996 Hondas never seem to complain no matter how bad the O2 sensor is - and I think that will fix the hunting. If not, look for a leak at the intake manifold gasket on one end of the manifold. Unbalanced mixture will also cause hunting.
Reply With Quote
  #3 (permalink)  
Old 29 Nov 2009, 06:31 am
Senior Member
Join Date: Aug 2007
Posts: 112

It might be your Idle Air Control Valve. I had a similar problem to this and couldn't figure it out so finally took my Honda to a dealer who did a diagnostic on it, and it turned out to be a faulty idle air control valve. Honda wanted $500 to replace it, but I found a local mechanic who bought the part for $175 and charged me $100 labor.
Reply With Quote
  #4 (permalink)  
Old 29 Nov 2009, 06:46 am
Senior Member
Join Date: Aug 2007
Posts: 266

Idle air valve,there are 2 small coolant hoses,see if there is coolant flow through,if not try to unclog them,it uses hot coolant to open and close valve inside of it.Bad oxygen sensor does not affect idle speed.
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
My 1986 Honda Accord LX idles way too high at various times. Any thoughts about what causes this? Don A Honda Technical 3 24 Jul 2010 02:41 am
91 accord idles erratically ndrew2505 Honda Technical 0 25 Oct 2008 12:48 am
My 1989 Honda Accord LX idles erratically when I stop at a sign or light, why? melissaford28 Honda Technical 4 13 Dec 2007 11:46 am
honda accord idles high, rpm 3-4, what can be problem? see details? Nita N Honda Technical 6 07 Oct 2007 05:06 pm
87 honda accord idles rough kalley Honda 2 1 29 Nov 2006 09:31 pm

All times are GMT -5. The time now is 11:05 pm.

Honda News | Autoblog
Powered by Yahoo Answers

Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc. is not affiliated with Honda Motor Company in any way. Honda Motor Company does not sponsor, support, or endorse in any way. Copyright/trademark/sales mark infringements are not intended or implied.