k so my car is a 92 GS with a second generation B16A swapped into it, the garage that sold it to me did the swap not me. I bought it before winter hit and the idle never hunted at all then as soon as winter hit it started hunting all the time, and now winter is on its way out and its still hunting. I've tried everything to try and fix it. I've gone through this list http://www.g2ic.com/forums/sho...+step the best i could and its still hunting. i also did this http://www.g2ic.com/tegtips/engine/10.html last night and its still hunting. my ground cables are 4 gauge aswell by the way.

VIDEOS:

http://youtube.com/watch?v=FswFPfwQWpk

k so that video is just the car idling at normal operating temperatures and me and a friend just tapping the gas and watching the idle hunt, so you can see how bad it hunts.

http://youtube.com/watch?v=FNq0edeXHRo

that video was me driving while filming my tach so you can see how bad it hunts while i'm driving, every time u see the RPMs drop down and i'm not shifting i just threw down the clutch pedal and i'm sitting there coasting without touching the gas or the brakes and u see it hunt. it seems to hunt about 200 rpm higher then while idling, also sometimes i have seen it jump up to 2100 but i unfourtunately didn't catch that on film but it does do it quite often.

the sound is a bit off on both videos but you get the idea...

I have cleaned the FITV and IACV as best as i could, i had them both completely off the car and cleaned them with throttle body cleaner and tightened down the FITV white cap as tight as it could go and i also cleaned the area around and as far into the intake manifold as i could before putting them back on.

now going back to this list http://www.g2ic.com/forums/sho...+step

1. I have checked my vacuum lines myself from atop the car and from underneath it the best i can using a diagram from mitchell on demand5 i didn't find any bad hoses but then again i'm not a mechanic and i'm not a pro at it. my pcv valve is fine.

2. yes my throttle plate is closed all the way...

3. yeah i checked these nuts and they're all good and tight

4. haven't bleed my coolant but if there is air in the lines and thats whats causing the hunt wouldn't it stop after they've cycled through once? or would it continue and continue. i dont' think this is it though because as i said my car didnt' hunt before winter but ever since winter hit it has and i didn't bleed the coolant or anything during that time the only thing i did was add to it once in awhile. could something have gotten screwed up here when i was working on the IACV and FITV and had the coolant lines on? i know i put them back on the right places but could air have gotten in?

5. as stated before already did this...

6. as stated before already did this...

7. i did test this but i dont' remember the results i'll have to do it again and post back here....

8. haven't done this yet

9. um definitely dont' ahve the money to spend for a new ecu...

i have also had the car running and sprayed throttle body cleaner around the engine bay to see if the engine would rev therefore finding my vacuum leak but this revealed no results. and today i also tried this with compressed air, still no results....

so at this point i'm thinking about taking it into my mechanic and asking them to try to fix it and see what they come up with.

what do you guys thing i should do?

and if anyone can point me to where i can find a good vacuum diagram of a b16a in an integra without it costing me money then please do so.

and one more thing my car has an AEM fuel pressure regulator if that matters at all...

 

Looks like your idle isn't hunting at all. Your rpms settle at 750, which is perfect for a stock car. See your tach, that heavy white line between 0 and 1. That is 500rpms, and your car is between that and 1000rpms, which would be 750, perfect.

In your second vid, your car isn't at operating temp yet, that is why it is idling up around 1500rpms.

Whenever you hear of someone saying that there idle is hunting, that means that it is constantly going up and down, yours sits at solid 750. Unless there is something going on that your video doesn't show, your just trippin and can't read a tach, (cause the guy said 600rpms) and your at 750.

 

it should have been at good operating temp cuz i took it out for that drive right after we did the idle testing, but it is cold outside.

i thought that jumping is what you called idle hunting? cuz when i throw in the clutch it clearly drops down then makes it way back up all on its own without me touching the gas and then slowly comes back down... what do you call that then? because i want to figure out how to fix this.

even if my car wasn't at operating temp like my gauge was saying it shouldn't idle higher in cold weather anymore anyways because when i put the FITV back in i screwed in the white thing all the way back in which is supposed to stop the high idle during warmup stuff.

i donno i wanna get this wandering fixed and the jumping up to 2100 that i unfourtunately didn't get on video but i've been working on this forever and searching for everything and i had never made a post until now because i was seeing if i could fix it myself before asking for more help but it seems that i can't.

what i'm really wondering is you can see my idle drop down when i throw down the clutch pedal and then hunt back up then come back down in the video right? what do you call that and how do i fix it?

 

when the car is in motion , its normal for the car to keep its revs like it was doing as well when you let off. car keeps it revs like that for power steering reasons. i see what you mean though , the little rise before the fall. it shouldnt do it. and id say its not a vacuum leak , as they tend to make cars idle higher than normal constant.

 

Hmm well you make another person that agrees it shouldn't be doing the fall then rise then stay then fall stuff but nobody knows how to fix?

 

BUMP

 

make sure there is no oil on your spark plugs...i forget what gasket prevents oil from getting there but my cousin said oil on plugs CAN cause weird idle

 

I just cleaned and regapped them yesterday so yeah thats not it they were fine...thx tho