civic really low idle
 

Hi guys, i have a 94 honda civic with a d16z6. When the car is cold it idles at about 1.5k rpms but once it warms up the idle drops down to about 100rpms, this suck because the whole car shakes. I tried adjusting the throttle screw but it wont work and yes i unplugged the iacv before adjusting. I also changed out the iacv and got a new tps sensor there are no vacume leakes either i checked for that. Can any poit out the problem? Thanks

Re: civic really low idle
 

It sounds like you need to clean out your FITV
https://honda-tech.com/forums/acura-integra-6/%2A%2A%2A-how-%2A%2A%2A-clean-your-fitv-aka-fast-idle-thermo-valve-1564019/

Re: civic really low idle
 

sometimes the idle regulator plunger cloggs up its easy to clean and can be found bolted to the inlet manifold i had the same problem and the car also does it after a weeks worth of no usage but settles into proper idle once it has done some miles

Re: civic really low idle
 

Ill clean the FITV today. And where is the idle regulator plunger? Thanks

Re: civic really low idle
 

I just cleaned the FITV, it wasnt that dirty but i cleaned it anyways. When i put it back the same thing happene,, the idle was still really low. I couldnt find the idle regulator plunger, do you havve any pics of it?

Re: civic really low idle
 

My hatch does the same thing... usually when I start it up first thing in the morning(it idles around 400-600 rpms) but after a couple seconds it idles normal.... cleaning the iacv helped out somewhat ill try cleaning out the fitv next

Re: civic really low idle
 

Have you tried adjusting the FITV?

Re: civic really low idle
 

Yea, and the idle only rises when its cold and once the car is warmed up it goes down to like 100rpms

Re: civic really low idle
 

Follow FSM procedure to adjust your idle speed. There's a how-to in the FAQs sticky. Also, at 100rpm your engine would stall itself out. Stock tachometers are notoriously inaccurate.

Re: civic really low idle
 

My engine dpesnt stall but it shakes like if it will stall

Re: civic really low idle
 

Like I said, at 100rpm, your engine WOULD stall.

Also, like I said, follow FSM procedure to readjust your idle.

Re: civic really low idle
 

What is FSM, im sorry?

Re: civic really low idle
 

Factory Service Manual.

Read the FAQ's sticky, the write up there follows FSM procedure.

Re: civic really low idle
 

Ok i just finished all the steps in the FSM and it worked for like 10 minutes the the idle dropped down again

Re: civic really low idle
 

I had the same problem and swapped out the iac and still had the same problem that started about a week later ended up having a bad iac and to replace it again