Idle surges when engine is warm, low engine temp or IAC or FITV
03-23-2018
#1
Registered!!
Thread Starter
Join Date: Mar 2018
Age: 29
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
Idle surges when engine is warm, low engine temp or IAC or FITV
I have a 1995 1.5L Civic Dx 4 door. The car starts up fine, but when the engine warms up the idle surges and drops repeatedly. I read on some threads that it could be the IACV, or the FITV, or leaky vacuum hoses, or air bubble in coolant. I checked the first three, and did not find any problems; I cleaned out the IACV, but the idle surging/dropping continues. I have noticed that the engine temperature is lower than normal, about 1/3 of the way on the gauge, or just below the 1/2-way mark. I wonder if this is causig the idle? How can I check the coolant temperature sensor with a volt meter? Also, there are no check engine lights. Unfortunately, I do not have a shop manual, so I am getting all my repair information from online. Thanks.
Last edited by Wilco; 03-23-2018 at 12:57 PM. Reason: add
03-23-2018
#2
If you think a good mechanic is expensive, try hiring a bad one
Re: Idle surges when engine is warm, low engine temp or IAC or FITV
How can I check the coolant temperature sensor with a volt meter?
Let it sit and run until the radiator fan comes on....Coolant temp should be about 195-200F or so when the fan kicks on.
See where your gauge is at and see if the idle is stable at that time.
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Kenny McClendon
Fuel, Oil, Cleaners & Other Maintenance
2
11-28-2019 09:01 PM
PlzHelp
7th Generation Civic 2001 - 2005
1
02-01-2018 08:55 PM
askem27
Mechanical Problems/Vehicle Issues and Fix-it Forum
0
06-11-2012 02:49 PM
NO FAME2
Mechanical Problems/Vehicle Issues and Fix-it Forum
0
02-05-2012 01:09 AM
leonhsieh
General Honda Civic Forum Archive.
0
07-11-2005 10:05 AM
