'90 Civic 16 Valve idling up and down
Thread Starter
Joined: Aug 2007
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From: San Marcos, TX, USA
'91 Civic 16 Valve idling up and down
Once the engine gets warmed up, the idle drops until the car almost dies and then revs back up. Then it starts the whole process over. I looked around the internet elsewhere before i posted here, but its usually newer cars than mine that they're talking about. Also, people give part names that don't exist in my manual like IACV??
My CEL is not on and I do not have a tachometer to check the idle.
Any suggestion?
Modified by drumforever at 4:46 PM 8/23/2007
My CEL is not on and I do not have a tachometer to check the idle.
Any suggestion?
Modified by drumforever at 4:46 PM 8/23/2007
Stouts 'n' Scotch
Joined: Jul 2006
Posts: 5,383
Likes: 0
From: Milwaukee, WI
Re: '91 Civic 16 Valve idling up and down (drumforever)
What manual do you have? It's either called the IACV or EACV (Idle or Electric Air Control Valve).
Try taking it off and cleaning it first.
Here's how:
https://honda-tech.com/zerothread?id=1575913
That process is for an Integra, but it's exactly the same for your vehicle. Good luck!
Joined: Jul 2007
Posts: 42
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From: Tville, NC, United States
Re: '91 Civic 16 Valve idling up and down (wiZCo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wiZCo »</TD></TR><TR><TD CLASS="quote">
What manual do you have? It's either called the IACV or EACV (Idle or Electric Air Control Valve).
Try taking it off and cleaning it first.
Here's how:
https://honda-tech.com/zerothread?id=1575913
That process is for an Integra, but it's exactly the same for your vehicle. Good luck!</TD></TR></TABLE>
What manual do you have? It's either called the IACV or EACV (Idle or Electric Air Control Valve).
Try taking it off and cleaning it first.
Here's how:
https://honda-tech.com/zerothread?id=1575913
That process is for an Integra, but it's exactly the same for your vehicle. Good luck!</TD></TR></TABLE>
Thread Starter
Joined: Aug 2007
Posts: 3
Likes: 0
From: San Marcos, TX, USA
Re: '91 Civic 16 Valve idling up and down
It's called an EACV in my manual. Mine is a copy on disc. It just says Shop Manual on the image of the front cover. It also says it's for an 88 if that makes any difference.
Stouts 'n' Scotch
Joined: Jul 2006
Posts: 5,383
Likes: 0
From: Milwaukee, WI
Re: '91 Civic 16 Valve idling up and down (garageEF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by garageEF »</TD></TR><TR><TD CLASS="quote">try flushing and filling your cooling system. and make sure you bleed it correctly like the manual says.</TD></TR></TABLE>
Ahhhh, I always overlook this one for some reason. It may be due to an air bubble in the coolant as well.
Ahhhh, I always overlook this one for some reason. It may be due to an air bubble in the coolant as well.
Thread Starter
Joined: Aug 2007
Posts: 3
Likes: 0
From: San Marcos, TX, USA
Re: '91 Civic 16 Valve idling up and down (wiZCo)
So far I guess it was an air bubble. It seems to be running fine now. This is my first Honda and I have never EVER heard of bleeding the coolant system, at least not in any American car I've ever owned. Thanks for the help guys!
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