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-   -   surging idle (SOLVED, answer at bottom) (https://www.homemadeturbo.com/hybrid-tech-8/surging-idle-solved-answer-bottom-45857/)

FooK 09-09-2005 10:57 PM
surging idle (SOLVED, answer at bottom)
 
Bone Stock d16z6 with a cold air intake, and APEX'i V-AFC Installed

original motor in the stock car it came in, 150K on it, doesnt burn oil, doesnt leak anything, good strong engine.

problem.

Idle surges from 1000-1500. The surge is very systematic, its always at the same tempo and goes to the same rpm range.

what kinda ---- can cause this? IACV has been replaced, cant see any vacuum leaks, its not like theres tons of vacuum lines on a 95 SI.

ideas?

Civic4Sale 09-09-2005 11:08 PM
Re: surging idle
 
check the plugs. make sure the plugs are hook up to the right sensor. I had the exact same problem you had. Didnt throw any CEL but i soon realize that i hook the plugs wrong.

FooK 09-09-2005 11:21 PM
Re: surging idle
 
Originally Posted by EG6Sleeper
check the plugs. make sure the plugs are hook up to the right sensor. I had the exact same problem you had. Didnt throw any CEL but i soon realize that i hook the plugs wrong.
id be surprised if thats it, this car's pretty untouched, but ill try that real quick.


nope, not it. all the factory harness clips and everything are so intact that none of the plugs will reach the wrong sensor.

i did however unplug the IACV and the idle smoothed out....but it idled at like 2000rpm.

could it be the IACV was replaced with another bad one?

88dx 09-09-2005 11:36 PM
Re: surging idle
 
Thats what you get for having a NA d16z6 ;) It still might be the IACV? Also Make sure you dont have any bubbles in the coolant

FooK 09-09-2005 11:39 PM
Re: surging idle
 
Originally Posted by 88dx
Thats what you get for having a NA d16z6 ;) It still might be the IACV? Also Make sure you dont have any bubbles in the coolant
ill bleed it in the morning before I head to woodburn.

hey steve, send me an IACV, i know you have one.

If I do turbo this car, I want B-series first and I have to retain AC, I don't want to cut this car up like crazy

88dx 09-09-2005 11:41 PM
Re: surging idle
 
Your a ----- if you keep AC.

FooK 09-09-2005 11:43 PM
Re: surging idle
 
Originally Posted by 88dx
Your a ----- if you keep AC.
its not so much about having AC, its about trying to keep this car nice. That's why I am hesitant to even modify it. I've got the truck to play with.

bumblezc 09-09-2005 11:55 PM
Re: surging idle
 
Idle Screw!!! I have had this problem 3 times before and it was one of 2 things

1st time: Intake Gasket was shot=a vacuum leak
2nd time: Fixed itself????????
3rd time: For my car a 2 others Idle screw backs out from the vibration, raising the idle. ECU sees the high idle and tries to achieve it's "Ideal" idle, over compensates, shots it back up, tries to fix it aaannndddd it's a viscous cycle!!!! I just use a dab of gasket sealant on my screw to glue it there and call it a day.

FooK 09-09-2005 11:56 PM
Re: surging idle
 
Originally Posted by bumblezc
Idle Screw!!! I have had this problem 3 times before and it was one of 2 things

1st time: Intake Gasket was shot=a vacuum leak
2nd time: Fixed itself????????
3rd time: For my car a 2 others Idle screw backs out from the vibration, raising the idle. ECU sees the high idle and tries to achieve it's "Ideal" idle, over compensates, shots it back up, tries to fix it aaannndddd it's a viscous cycle!!!! I just use a dab of gasket sealant on my screw to glue it there and call it a day.
damn, thats idea enough to go out and try it, even at 10pm


**edit***

but not the idea i need, didnt do a damn thing. idle screw still had that original greyish honda silicone over it, and was only turned out a little bit.

Civic4Sale 09-10-2005 12:37 AM
Re: surging idle
 
i wasnt reading earlier. But you installed a APEXI VAFC? What are your settings. I had that problem with the RPM. I think you might set the VAFC a bit rich. Try lowering the setting. And did you get a resistor box or resistor for those low impendence injectors?

Was the idle ok before you installed the VAFC?

FooK 09-10-2005 12:40 AM
Re: surging idle
 
Originally Posted by EG6Sleeper
i wasnt reading earlier. But you installed a APEXI VAFC? What are your settings. I had that problem with the RPM. I think you might set the VAFC a bit rich. Try lowering the setting. And did you get a resistor box or resistor for those low impendence injectors?

Was the idle ok before you installed the VAFC?
the car is bone stock, injectors are factory, nothings ever been pulled off of this motor.

the AFC was supposedly just installed and left zero'ed out and only used as a tach. once i figure out how to use it ill make sure its all set zero'ed out.

Civic4Sale 09-10-2005 12:46 AM
Re: surging idle
 
you are like waiting on your post for replies. You must be bored. ;D

also check your radiator for coolant. If it is low or empty. It also caused surging.

FooK 09-10-2005 12:47 AM
Re: surging idle
 
Originally Posted by EG6Sleeper
you are like waiting on your post for replies. You must be bored. ;D
yup, sitting here in the beachhouse watching steve and mary bicker, and checking my threads.

Civic4Sale 09-10-2005 12:48 AM
Re: surging idle
 
check your radiator for coolant. If it is low or empty. It also caused surging. check the gasket to the IM, TB. the gasket might be bad and cause leaking

Help me answer my question i posted. :)

Dx 101 09-10-2005 10:56 AM
Re: surging idle
 
my car does this from 1k to 2k until warm ::) no clue but i think its my fault good luck

FooK 09-10-2005 12:19 PM
Re: surging idle
 
well no one suggested it but I fixed it

Problem: FITV

they have a threaded cap on the inside that slowly backs itself out over time. Pulled it off, tightened it back up, and voila.

http://www.honda-tech.com/zerothread?id=699787

Bone1 09-10-2005 02:17 PM
Re: surging idle (SOLVED, answer at bottom)
 
why pull it off? no need to remove from car to fix............I tighten mine yearly due to ES motor mount inserts.......

http://www.bettendorf.com/~mrbone/pi...Tech/FITV1.jpg

http://www.bettendorf.com/~mrbone/pi...Tech/FITV2.jpg

http://www.bettendorf.com/~mrbone/pi...Tech/FITV3.jpg

Been doing it for 6 years now.........

shanerv 09-10-2005 02:20 PM
Re: surging idle (SOLVED, answer at bottom)
 
so then that only is on 0BD-0 intake manifolds?

FooK 09-10-2005 05:28 PM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by shanerv
so then that only is on 0BD-0 intake manifolds?
not unless you know of any OBD-0 Civics made in 1995.

Originally Posted by Mista Bone
why pull it off? no need to remove from car to fix............I tighten mine yearly due to ES motor mount inserts.......

http://www.bettendorf.com/~mrbone/pi...Tech/FITV1.jpg

http://www.bettendorf.com/~mrbone/pi...Tech/FITV2.jpg

http://www.bettendorf.com/~mrbone/pi...Tech/FITV3.jpg

Been doing it for 6 years now.........
Well, for one I've never had an idle issue so Ive never needed to do this before, and also that plate faces the firewall, that woulda been a pain in the ass to do in the car from what I can tell.

Cray91 09-10-2005 05:33 PM
Re: surging idle (SOLVED, answer at bottom)
 
offset screwdriver is your friend.

Civic4Sale 09-11-2005 05:51 AM
Re: surging idle (SOLVED, answer at bottom)
 
where exactly is this FITV located at?

J-MAN 09-11-2005 11:30 AM
Re: surging idle (SOLVED, answer at bottom)
 
from the sounds of it, it is on the bottom of the TB but i have never noticed it before :-[. i better go check mine today

87na_rx7 09-11-2005 12:10 PM
Re: surging idle (SOLVED, answer at bottom)
 
i always just use some jb weld to block that ---- off, perfect idle all the time

FooK 09-11-2005 12:30 PM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by EG6Sleeper
where exactly is this FITV located at?
bottom of the throttle body.

HMT-Admin 09-11-2005 03:49 PM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by Rx7toCivic
i always just use some jb weld to block that ---- off, perfect idle all the time
indeed, I bypass the coolant lines together and just block the fucker off.

FooK 09-12-2005 12:19 AM
Re: surging idle (SOLVED, answer at bottom)
 
bah, the 5 minutes spent tightening it vs. getting some more hose to link the two together, and getting jb weld to seal it off, then letting it cure and such = way easier just to tighten the thing.

Civic4Sale 09-12-2005 05:16 AM
Re: surging idle (SOLVED, answer at bottom)
 
jb weld is forever. 5 mins spent on tightening will eventually get loose. ;)

B16CRXT 09-12-2005 04:26 PM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by EG6Sleeper
jb weld is forever. 5 mins spent on tightening will eventually get loose. ;)
I forgot what the FITV helps with (warm or cold idle), but Honda wouldnt put it on for nothing. I'd rather keep it if I could.

FooK 09-12-2005 08:25 PM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by EG6Sleeper
jb weld is forever. 5 mins spent on tightening will eventually get loose. ;)
really, thats odd. 4 years of having my other car and that one never came loose.

Originally Posted by B16CRXT
I forgot what the FITV helps with (warm or cold idle), but Honda wouldnt put it on for nothing. I'd rather keep it if I could.
here here.

Bone1 09-12-2005 09:51 PM
Re: surging idle (SOLVED, answer at bottom)
 
why a offset screwdriver?

I use a 1/4" driver ratchet with a socket.......

88crxSi 09-13-2005 10:54 AM
Re: surging idle (SOLVED, answer at bottom)
 
Originally Posted by B16CRXT
Originally Posted by EG6Sleeper
jb weld is forever. 5 mins spent on tightening will eventually get loose. ;)
I forgot what the FITV helps with (warm or cold idle), but Honda wouldnt put it on for nothing. I'd rather keep it if I could.
Its for cold idle environmental poop.

1. Warms up the engine quicker with higher RPMs
2. Car runs rich when cold so high idle helps burn the excess fuel
3. when car reaches normal temp all idle is handled by the IACV.
4. Idle problems are a PITA.

Out.


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