1997 civic hx fluctuating rpms
Thread Starter
Honda-Tech Member
Joined: Jan 2006
Posts: 612
Likes: 0
From: NJ, USA
1997 civic hx fluctuating rpms
My gf's 1997 civic hx rpms will flucuate at idle and when cruising at a constant speed. Anyone experience this problem? Figure I'd ask if this is a common problem before I start pulling the TB and stuff off and cleaning them. Thanks in advance.
Thread Starter
Honda-Tech Member
Joined: Jan 2006
Posts: 612
Likes: 0
From: NJ, USA
Re: 1997 civic hx fluctuating rpms (HondaGuy951)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy951 »</TD></TR><TR><TD CLASS="quote">4 words... idle air control valve 
</TD></TR></TABLE>
Yeah I figured it was that. Should I clean it or just get a new one?
</TD></TR></TABLE>Yeah I figured it was that. Should I clean it or just get a new one?
Junior Member
Joined: Jul 2008
Posts: 74
Likes: 0
From: underhill center, vt, US
check your coolant too. mine had the hunting idle and some coolant fixed it. but for the aicv get some carb/throttle body cleaner and take it apart and give it a good clean. that may fix it. it only hunts after the car has warmed up, correct?
New User
Joined: Aug 2006
Posts: 292
Likes: 0
From: Stevens Point, WI, USA
Re: 1997 civic hx fluctuating rpms (HondaGuy951)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaGuy951 »</TD></TR><TR><TD CLASS="quote">4 words... idle air control valve </TD></TR></TABLE>
Honda IACV's actually don't go out all that often, however the thermal valve needs adjusting a lot of times and it has almost identical symptoms as the IAC so check that as well. And yes check the coolant and the hose going to the IAC, clean the IAC out with some brake parts cleaner or electric parts cleaner and clean the plug out as well.
</TD></TR></TABLE>Honda IACV's actually don't go out all that often, however the thermal valve needs adjusting a lot of times and it has almost identical symptoms as the IAC so check that as well. And yes check the coolant and the hose going to the IAC, clean the IAC out with some brake parts cleaner or electric parts cleaner and clean the plug out as well.
Junior Member
Joined: Jul 2008
Posts: 74
Likes: 0
From: underhill center, vt, US
Re: 1997 civic hx fluctuating rpms (B16SolMan)
supposable the IACV is to blame if the idle hunts after the car has warmed up
if the car hunts upon start up its the thermal valve. at least that's what I've found out through a ton of research
if the car hunts upon start up its the thermal valve. at least that's what I've found out through a ton of research
Trending Topics
Honda-Tech Member
Joined: Mar 2007
Posts: 698
Likes: 0
From: Dont Steal My Shit, NY, United States
Re: 1997 civic hx fluctuating rpms (blueshark123)
Well, its weird because mine surges at idle but not when I'm driving. I've cleaned/replaced the IAT sensor, IACV, and the TPS and for some reason, I still surge. I'm very close to ordering a new TB. Bump for more info/help.
New User
Joined: Aug 2006
Posts: 292
Likes: 0
From: Stevens Point, WI, USA
Re: 1997 civic hx fluctuating rpms (tadashisan)
Vacuum leaks primarily cause surging/misfires under acceleration so if it's not happening when he's driving that probably won't be it--doesn't hurt to check anyways though
Thread
Thread Starter
Forum
Replies
Last Post
