1993 Civic DX idle's up and down
#1
Honda-Tech Member
Thread Starter
Join Date: Jan 2002
Location: Canada
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
1993 Civic DX idle's up and down
A friend has a 1993 Civic DX with original/stock 1.5L motor. The car gradually began to idle up, and down. It seems to rev up to 3000rpm or so, then down, etc. We checked and the vacuum lines are OK. The motor seems to be in good shape, otherwise. I am thinking it is a sensor of some kind. any suggestions would be great.....Thanx
#4
Honda-Tech Member
Join Date: Jul 2002
Location: Chicagoland, usa
Posts: 5,695
Likes: 0
Received 0 Likes
on
0 Posts
Re: 1993 Civic DX idle's up and down (90CIVICSI)
If this happens during warmup and after warmup, I'd check the Fast Idle Valve, should be the little device under your throttle body. Its possible the spring is broken or something is stuck. Maybe give it a clean with some throttle body cleaner.
Thread
Thread Starter
Forum
Replies
Last Post
darkstormcr
Honda Civic / Del Sol (1992 - 2000)
9
05-26-2011 05:46 PM
jefe
Honda Civic / Del Sol (1992 - 2000)
13
01-11-2011 09:21 AM