here's the deal. When my car is cold or fully warmed up, the car revs from 900rpm to 1800. back and forth kinda thing. Anyways, this all happened after I swapped in a Auto JDM h22a into my manual 92 lude. I'm currently using a Auto ECU. Could the ECU be the culprit?? I checked all the hoses and everything is plugged in. I bled the coolant and topped it off. Cleaned the TB. Reset the ECU. Same problem. Ok, here's the really weird thing! Well when I put my axles in during the swap, I didn't shove the passenger side in so it kept popping out when I drove. Drove me nuts cause I thought I had a faulty tranny. Anyways, when the axle popped out, my fluctuating idle would stop!! Totally weird. It would sit at 1300rpm but it wouldn't fluctuate. How can this be?? I would shove the axle in and the bouncy idle would come back. Can anybody help me?? PLEASE!!!!
Dude, my 95 Si does the same thing. It's almost like a heartbeat.
up down up down, but after my car warms up a bit, it goes away. I haven't
done any swaps. it is the stock H23, auto. 78000 on it. I thought it was the
timing belt, but i had it checked and it was fine. It might be a bad oxygen
sensor, or cold idle sensor. I'm stumped too........
I had a ***** of a time getting mine to idle smoothly after the swap. Its because the JDM engines have different emissions equipment.
I hooked up the IAC a couple of different ways and it got better, not fixed.
wiat til the car is warm and get a screwdriver and lower your idle until it stops, drive a mile and lower it agin until it stops... keep doing this until it stops for good.
Right not my car idles at about 500 rpms, its lower then factory(750-850) but atleast it doesnt bounce anymore.
I tried to lower my idle with by messing with the idle screw. I turned it all the way till it wouldn't screw in anymore. It still idles from 900rpm to about 1300rpm. It's better then going from 900-2000rpm. Anyways, I drove around for a lil while and my car is a gas guzzler!! It wastes A LOT of gas. well anymore suggestions?
mine is doing the exact same thing JDMpower, i have a h23a with some of bradysmods and the idle is turned all the way down (clockwisse) and it still does this. im stumped
my idle does this too. it sucks it goes from like 450-1400 rpms. my headlights dim when it gets down low. its really freaky. i have a 94 si i swapped an h22a into. i have the right ecu and everything. i hope someone figures this out. its especially doing it after i race. weird...
__________________
2000 prelude base i/h/fly
90 240sx ka-t
95 240sx ka-t
love my toys
let me guess...you all have the coolant bypass mod done? if so...MAKE SURE you blocked off the piece that is below the throttle body, if you forgot that step, you will have this problem. i had this problem after i cleaned out by throttle body....and it majically went away after a while.....wierd
Yea that is from a vaccume leak. if you cannot get rid of it by adjusting the idle skrew then its a vaccume leak. Definately
I spent a lot of time getting rid of that crazy idle.
__________________
AIM:ISUBIEXI
S/SI/Vtec Hybrid. RS*R Header, JDM downpipe, Custom Downpipe back 2.25 Exhaust, Intake, ""Mugen"" Programmed p13, No balancer belt, no AC, Fidanza Flywheel, ACT clutch, SI trans, Power Slot rotors, SkunkII Coilovers, Enki Rims.
I'm almost stock except for a cai and I remember trying the vacum
trick for the flapper mod and another mod on the TB but I put back to stock and I am going through the same problems now that it is cooler!
Just got back from SF today and last night it was doing it really bad when it was just idleing
I think that it is probaly some vacumn or sensor problem!
By the way I need to replace my oxygen sensor and damn are they expensive does anyone know of a discount or cheap place to get them??
I had this same problem in the last few months with my Lude and it turned out to be the fuel pressure regulator. My mechanic also told me that it could have been the ignition module which is located in the distributor.
i'm having this problem as well and i don't have any clue what the coolant bypass mod is, or any of the other abreviations in here. I have a 93 h23a with port/polished heads and bored out a lil. I've had the bouncing idle come and go for a long time and i would love to finally solve this weird phenominon. Any help would be great.
Wow... This is very strange, my 93 H22A is having the same problem and i too don't know much about this engine because it is fairly new to me. I was logging on to post this exact problem when i saw this post. Any additional help would be awesome
It's probably the fast idle thermal valve. Do the throttle body test. Take off your intake and put your finger over the bottom hole inside the TB. When you have suction on it and the idle goes back to normal, it's your fitv.
__________________
-Steven
Quote:
Originally Posted by vile10
not to offend anyone but usually when you hear a loud noise but never see the car for a long while, that's probably a civic
Ok i think i understand what your talking about... i need to take off the intake and crank the car first right... then put my finger over the bottom hole in the TB? And if there is suction.... what then?
I had that idoling problem and i took it to a honda dealership they said it was the idol air control valve and they took it off and cleaned it for like 60 dollars and its been doing fine ever since.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Dude, my 95 Si does the same thing. It's almost like a heartbeat.
Linear Mode
