crazy idle issues - D-series.org

Go Back   D-series.org Motor Mayhem & Suspension Satisfaction Engine Management

D-Series.org is the premier Honda All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-08-2005, 12:56 PM   #1 (permalink)
zseeanz
Guest
 
Posts: n/a
Default crazy idle issues

I have a d16y8, I'm running hondata on a P28 ecu. I'm having some major idle issues. When I start the car it idles around 2500rpms until it warms up. Then after that it still idles high, around 1200rpms. When I come to a stop sign, or a light, the idle bounces between 1k rpms and 2k rpms. Sometimes it bounces and sometimes it's just high. OK, I've done some research and some say it's the iacv. Well I though it was too, but I changed this out about 6 months ago, so it's pretty new. So I'm pretty sure that's not it. It's obd1 but running an obd2 iacv. It's a M/T y8, so I was told it's already a 2-wire, so I don't need to convert it. I've had this issue for awhile, that's why I got the new iacv. It fixed it for a little bit, but it gradually got worse over time and now it's the worst it's ever been. Another thing I can think of that I don't know if it has anything to do with it, is I have a test pipe so the O2 sensor that went in the cat is just zip tied out of the way. I doubt that has anything to do with it. Please help me out with this, it's really pissing me off. I was also told it could be the tps, but if it was that, wouldn't it happen all the time?
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-08-2005, 01:06 PM   #2 (permalink)
wise in the ways of the D
 
hondajosh's Avatar
 
iTrader: (2)
Join Date: Mar 2005
Location: Benton, LA
Posts: 1,505
Rep Power: 15 hondajosh will become famous soon enoughhondajosh will become famous soon enoughhondajosh will become famous soon enough
iTrader Score: 2 reviews
Default

Maybe its a bad manifold gasket or tb gasket........did you get a NEW ICAV or new to you (used)
hondajosh is offline   Reply With Quote Quick reply to this message
Old 12-08-2005, 01:10 PM   #3 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

The iacv was brand new. Also the tb gasket and intake mani gasket were put on when I put the turbo kit on.
  Reply With Quote Quick reply to this message
 
Old 12-08-2005, 01:14 PM   #4 (permalink)
wise in the ways of the D
 
hondajosh's Avatar
 
iTrader: (2)
Join Date: Mar 2005
Location: Benton, LA
Posts: 1,505
Rep Power: 15 hondajosh will become famous soon enoughhondajosh will become famous soon enoughhondajosh will become famous soon enough
iTrader Score: 2 reviews
Default

have you checked all your vacuum lines? is your throttle cable too tight causing the tb blade to stick?
hondajosh is offline   Reply With Quote Quick reply to this message
Old 12-08-2005, 01:23 PM   #5 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

throttle cable is fine and vac lines a perfect
  Reply With Quote Quick reply to this message
Old 12-08-2005, 01:24 PM   #6 (permalink)
I <3 TIG Welding
 
9295EJ-t's Avatar
 
iTrader: (8)
Join Date: May 2005
Location: Jax, FL
Posts: 3,984
Rep Power: 24 9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!
9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!9295EJ-t is the fucking MAN!!!!
iTrader Score: 8 reviews
Send a message via AIM to 9295EJ-t Send a message via Skype™ to 9295EJ-t
Default

fast idle thermo valve.. it is one the underside of the throttle body... the valves are known to stick shut.. take it off (3 10mm bolts).. and check it..
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
9295EJ-t is offline   Reply With Quote Quick reply to this message
Old 12-08-2005, 01:32 PM   #7 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

My car doesn't have a fitv.......It's a 99ex
  Reply With Quote Quick reply to this message
Old 12-08-2005, 03:55 PM   #8 (permalink)
 
iTrader: (2)
Join Date: Sep 2005
Posts: 82
Rep Power: 0 greenex is trying to make new friends
iTrader Score: 2 reviews
Default

i have a very similar problem, and i'm using crome. others running uber have the problem too. i think the problem lies elsewhere (not iacv). maybe grear correction or just using the obd1 ecu with a y8. not sure
greenex is offline   Reply With Quote Quick reply to this message
Old 12-08-2005, 06:29 PM   #9 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

Damn, anyone else having issures or know what's up? When I got hondata and got it tuned it idled kinda high, like 1k. But it wasn't surging.
  Reply With Quote Quick reply to this message
Old 12-11-2005, 03:41 PM   #10 (permalink)
Member
 
zc1.8crx's Avatar
 
iTrader: (0)
Join Date: Apr 2005
Location: CT
Posts: 58
Rep Power: 0 zc1.8crx is trying to make new friends
iTrader Score: 0 reviews
Default

I've got a 97 civic ex that does the same. I did some research and found that people using the newer uber and crome have this idle issue. Im going to try an older version of crome or uber and see if that works.
zc1.8crx is offline   Reply With Quote Quick reply to this message
Old 12-11-2005, 05:52 PM   #11 (permalink)
i save your ass when you wreck
 
H2Bcivic's Avatar
 
iTrader: (25)
Join Date: Jun 2005
Location: demopolis, alabama but from Nor*Cal
Posts: 6,693
Rep Power: 29 H2Bcivic Still a JDM Star....
H2Bcivic Still a JDM Star....H2Bcivic Still a JDM Star....H2Bcivic Still a JDM Star....H2Bcivic Still a JDM Star....H2Bcivic Still a JDM Star....H2Bcivic Still a JDM Star....
iTrader Score: 25 reviews
Send a message via AIM to H2Bcivic
Default

i have this problem to. my idle bounces up and down and wont stop. its alright when im moving just at an idle its fucked up. only thing is my car is stock other then intake header and exhaust...no hondata, uberdata or chrome
__________________
94 cx hatch: d16z6 aem CAI, chikara header
1/4: 14.72
MPH: 91.88
94 cx hatch: d16z6 same mods with 55 shot [email protected]
94 cx hatch: H2B JDM H22, b16lsd tranny +mods
1/4 - 11.719
MPH - 114.93
94 cx hatch: N/A b18c TBA
02 mustang gt: quick

Nitrous is like a hot girl with an STD... you wanna hit it, but your afraid of the consequences
H2Bcivic is offline   Reply With Quote Quick reply to this message
Old 12-12-2005, 05:38 AM   #12 (permalink)
the MAD scientist
 
mikeD16Z6's Avatar
 
iTrader: (25)
Join Date: Nov 2003
Location: NYU
Posts: 2,574
Rep Power: 19 mikeD16Z6 is a Top Aussie
mikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top AussiemikeD16Z6 is a Top Aussie
iTrader Score: 25 reviews
Default

Yeah, I've been having simmilar issues. It only happens when its cold. It's normal unless I blip the gas, then revs start going up and down. When the revs go down the WB reads dead lean.

No vacuum leaks. When I get home from work I'm going to try and adjust the IAC duty cycle slider thingy in Crome and see if that helps.
mikeD16Z6 is offline   Reply With Quote Quick reply to this message
Old 12-12-2005, 05:42 AM   #13 (permalink)
d-series smartass
 
9000_red's Avatar
 
iTrader: (9)
Join Date: Apr 2004
Location: the south
Posts: 1,348
Rep Power: 16 9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat
iTrader Score: 9 reviews
Default

i forget the name of the valve, but this is what worked for me:

under the tb towards the firewall is a metal plate with two screws on it. take the two screws out, and inside is a white plastic ball insided a plastic ring. use a small screwdriver to turn the ring in clockwise, maybe a 1/2 a turn (usually). this fixed my problem after months of headaches. try it out, it will work.
9000_red is offline   Reply With Quote Quick reply to this message
Old 12-12-2005, 05:54 AM   #14 (permalink)
d-series smartass
 
9000_red's Avatar
 
iTrader: (9)
Join Date: Apr 2004
Location: the south
Posts: 1,348
Rep Power: 16 9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat9000_red smells like Borat
iTrader Score: 9 reviews
Default

try this link

and this one

here's what a helpful post said:

Yup, had the same problem not too long ago. You'll need to remove the FITV, 4 bolts if im not mistaken. Some coolant is going to piss out after you disconnect the hoses but just let it drip.


There are two different metal caps, both held by 2 screws on opposites ends of the FITV. Remove the larger housing one first (not the flat metal one) and hold a lighter underneath the wax carrier (little metal thing inside that housing) while looking into the hole on the FITV body where it connects to the TB. Ensure that the piston IS moving after heated up, it may take a few seconds of holding the lighter underneath it.

If it moves, you're in luck, you can fix it yourself (even though Honda specifies these are set from the factory and theres no "fix" for them), and if it doesnt move, you'll need a new FITV.

If the piston moves, then re-attach the metal housing with 2 screws and remove the flat metal cover from the opposite end. There will be a small white plastic screw-in holder that limits the piston travel (i.e. this determines how much extra air the FITV is allowed to inhale to increase idle speed at cold idle).

All you need to do is adjust this, in my case, the holder had come completely loose and was not limiting travel whatsoever. Just tighten the holder down until it is snug (I was able to do it with one screwdriver, you might have to use 2 though being that it has a hole in the middle and two notches on the sides to adjust it).

Re-intstall the FITV to the TB and you're set...I'd suggest starting the engine with an open TB (intake not connected) so that you can check that everything is working properly. Sorry this turned into such a long post, just trying to be descriptive as I don't have any pictures to post. Good luck
9000_red is offline   Reply With Quote Quick reply to this message
Old 12-12-2005, 06:04 AM   #15 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

Yeah that's all fine and dandy, but I don't have a FITV
  Reply With Quote Quick reply to this message
Old 12-12-2005, 06:34 AM   #16 (permalink)
D-Series cadet
 
iTrader: (3)
Join Date: May 2005
Posts: 434
Rep Power: 15 nathan is learning the way of the Dnathan is learning the way of the D
iTrader Score: 3 reviews
Default

These symptoms are similar to having a uncalibrated TPS (like I did the other day, and still am trying to completely 'dial out'). However, since I'm sure ya'll didn't do anything with your TPS...

The issue may be coming from something similar - which is poor timing/fuel delivery maps at idle. When the TPS is uncalibrated for example, the ECU will inject fuel at erratic rates and cause the idle to bounce a little - sometimes even a lot. ESPECIALLY once the throttle is 'blipped'.

Just a thought - you may need to recheck your tune at idle.

Nathan
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
nathan is offline   Reply With Quote Quick reply to this message
Old 12-12-2005, 06:42 AM   #17 (permalink)
D-Series cadet
 
achilles1981's Avatar
 
iTrader: (7)
Join Date: May 2005
Location: St Louis Metro
Posts: 429
Rep Power: 15 achilles1981 smells like Boratachilles1981 smells like Boratachilles1981 smells like Boratachilles1981 smells like Boratachilles1981 smells like Boratachilles1981 smells like Borat
iTrader Score: 7 reviews
Default

I have a similar issue, but it I've tried every solution presented and it seems to work for a couple of days, then goes right back to the way it was before. Maybe if I set it to idle high, it won't kill the engine at stoplights.
__________________
"This is the captain... we might experience some slight turbulence and then... explode. "
-Captian Malcolm Reynolds, Firefly


RIP 98 HX project
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
achilles1981 is offline   Reply With Quote Quick reply to this message
Old 01-28-2006, 10:08 AM   #18 (permalink)
zseeanz
Guest
 
Posts: n/a
Default

Finally figured it out. It was a vac leak but it wasn't a line, it was leaking out og=f the evap purge solenoid. I just disconnected the evap system and it purrs like a kitten now.
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the D-series.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


iconAll times are GMT -8. The time now is 03:33 PM. | Welcome to Forum, please register to access all of our features.