Idle goes up and down
10-15-2012, 12:02 PM
#1
Honda-Tech Member
Thread Starter
Join Date: Jul 2012
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
Idle goes up and down
I have a problem with my automatic 94 Civic EX. After i drive my car for a bit and put it in park or neutral, my RPMs go up and down from about 1000-1500 RPMs.. What could it be?? 
10-15-2012, 06:45 PM
#3
10-15-2012, 06:58 PM
#4
Honda-Tech Member
Join Date: Sep 2009
Posts: 218
Likes: 0
Received 0 Likes
on
0 Posts
10-15-2012, 08:31 PM
#5
Honda-Tech Member
Thread Starter
Join Date: Jul 2012
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
Re: Idle goes up and down
This happened recently after i replaced my head gasket, i did it myself but i know i did everything right and put it back together right. Someone has also told me it could be the Air Control Valve.. could that be it?
10-15-2012, 09:32 PM
#6
Honda-Tech Member
Join Date: Jun 2012
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Re: Idle goes up and down
I have the same problem, Messing with the engine prior points to something that would have had to changed post head gasket change, I would first check vacuum lines, make sure all the clamps are snug and you put them all back on correctly.
10-16-2012, 09:00 AM
#7
Re: Idle goes up and down
Im not gonna start listing out the tons of different things it could be. Might as well send him on a wild goose chase if thats the case. You really need to either acquire a OEM service manual or download one and diagnose it yourself, or take it to a mechanic. This isnt something that can be diagnosed over a message board
Trending Topics
10-16-2012, 09:39 AM
#8
Honda-Tech Member
Join Date: Aug 2012
Posts: 260
Likes: 0
Received 0 Likes
on
0 Posts
Re: Idle goes up and down
96 and under civics have the fast idle thermo valve.
That is most likely your issue since you said it happens once it is warm..
Try bleeding your coolant system for starters.
That is most likely your issue since you said it happens once it is warm..
Try bleeding your coolant system for starters.
10-17-2012, 12:04 PM
#10
Honda-Tech Member
Thread Starter
Join Date: Jul 2012
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
Re: Idle goes up and down
I took off the IACV and cleaned it out, and i also bled the coolant system and it still runs the same
Last edited by xluigix47; 10-18-2012 at 02:38 PM.
Thread
Thread Starter
Forum
Replies
Last Post
raider1qaz
Honda Civic / Del Sol (1992 - 2000)
4
02-01-2013 12:44 PM
