Topic: idle issues (Read 6194 times)

shadow · « **on:** July 21, 2009, 10:14:54 PM »

so my friend acquire a civic from another friend. it has a swapped engine from what im told. its a 93, has a z6 and a p28.

http://smg.photobucket.com/albums/v396/shadow_seo/?action=view&current=0721091443.flv

i know nothing about the car other than that.

probably sounds much worse in the vid, shitty phone. but the idle is just surging up and down.

chris · « **Reply #1 on:** July 22, 2009, 12:05:39 AM »

fitv

iacv dirty. Do 3 cleaning with purple power and garden hose

ApexSilver06MR · « **Reply #2 on:** July 22, 2009, 01:01:44 AM »

low coolant or air pockets...

Joseph Davis · « **Reply #3 on:** July 22, 2009, 01:06:03 AM »

Quote from: c0mpl3x on July 21, 2009, 10:57:48 PM

iacv surging, clean it

Stop answering Honda questions, you don't know what you're talking about.

chris · « **Reply #4 on:** July 22, 2009, 01:09:18 AM »

Iacv cleaning especially with these old ass cars should be done regardless

Purple power for some reason cleans the shit wicked clean foams up all the nasty stuff much better than carb cleaner

Fitv is the worst thing ever and can be adjusted by opening up the plate held by 2 screws. problem is the are usually are so rusted out you break the screws opening the fitv to adjust it.

Joseph Davis · « **Reply #5 on:** July 22, 2009, 01:13:12 AM »

I've seen three dead IACVs in 12 years. I've seen zero carboned up IACVs. 90s Hondas aren't Fords, GMs, NisAnd because I'm an intellectual being, , or other garbage automobile prone to such failures.

crttaz · « **Reply #6 on:** July 22, 2009, 01:16:39 AM »

Quote from: ApexSilver06MR on July 22, 2009, 01:01:44 AM

low coolant or air pockets...

sorry, those don't cause idle issues.

crttaz · « **Reply #7 on:** July 22, 2009, 01:17:50 AM »

what model is the car?

MAP wiring.

shadow · « **Reply #8 on:** July 22, 2009, 03:08:37 AM »

Quote from: crttaz on July 22, 2009, 01:17:50 AM

what model is the car?

MAP wiring.

~~no clue, ill look it up and let you guys know when i see the car again.~~

starting reading shit, since i dont know a whole lot about civics. i think its ex since it has a sunroof

DmC · « **Reply #9 on:** July 22, 2009, 11:56:10 AM »

the only time ive ran into idle surging that fast was when a guy had the coolant lines going in and out of the iacv switched.

speedjunky01 · « **Reply #10 on:** August 26, 2009, 11:30:39 AM »

ok well instead of starting a new thread i searched (shocker i know) im having the same issue, finished a swap after i bought a car with a blown motor, is running ok minus the idel surging between 1000-2000 when warmed up. I took off the IACV/FITV and cleaned it out with just water but didnt help.

coolant seems to be bleed off well no bubbles ect

any more ideas?

Joseph Davis · « **Reply #11 on:** August 26, 2009, 11:57:53 AM »

Quote from: crttaz on July 22, 2009, 01:16:39 AM

Quote from: ApexSilver06MR on July 22, 2009, 01:01:44 AM
low coolant or air pockets...

sorry, those don't cause idle issues.

FIT-V cars, low coolant or air pockets = idle issues.

speedjunky01 · « **Reply #12 on:** August 26, 2009, 12:20:37 PM »

Quote from: Joseph Davis on August 26, 2009, 11:57:53 AM

Quote from: crttaz on July 22, 2009, 01:16:39 AM
Quote from: ApexSilver06MR on July 22, 2009, 01:01:44 AM
low coolant or air pockets...

sorry, those don't cause idle issues.

FIT-V cars, low coolant or air pockets = idle issues.

so reset the ecu and try again?

took off FITV on bottom on TB, the autos dont have an IACV that i can find not in the usual spot on the back of the intake manifold

cleaned it with purple power, gunk came out, put it back on still surging when warm :-P

when i plug up the FITV with my thumb it idles just fine so no vac leaks ect

Joseph Davis · « **Reply #13 on:** August 26, 2009, 12:27:46 PM »

No, start at the beginning of the thread and ignore everybody except for me.

You have a vacuum leak causing the engine to surge upwards. The ECU has a super low fuel cut revlimit, when warm, when it sees the throttle is closed which causes the idle to fall back down. Rinse and repeat.

Now, you need to fix your vacuum leak. No troubleshooting required as it's 95% likely your FIT-V. Unbolt it from the bottom of your throttlebody, mind the coolant line, take the flat metal plate off the backside of it, and rescrew the valve seat deeper into the body until it has a nice amount of interference against the plunger. The plunger retracts itself when cold, causing the classic cold Honda high idle, so the further you screw it inward the lower your cold idle will be and the sooner (temperature wise) your high idle will end. Reinstall.

Joseph Davis · « **Reply #14 on:** August 26, 2009, 12:28:38 PM »

Alright, sorry if I've been a dick and withheld info. There was a FIT-V sticky on ex-HMT, I ASSumed it came here too.

speedjunky01 · « **Reply #15 on:** August 26, 2009, 12:30:52 PM »

Quote from: Joseph Davis on August 26, 2009, 12:27:46 PM

No, start at the beginning of the thread and ignore everybody except for me.

You have a vacuum leak causing the engine to surge upwards. The ECU has a super low fuel cut revlimit, when warm, when it sees the throttle is closed which causes the idle to fall back down. Rinse and repeat.

Now, you need to fix your vacuum leak. No troubleshooting required as it's 95% likely your FIT-V. Unbolt it from the bottom of your throttlebody, mind the coolant line, take the flat metal plate off the backside of it, and rescrew the valve seat deeper into the body until it has a nice amount of interference against the plunger. The plunger retracts itself when cold, causing the classic cold Honda high idle, so the further you screw it inward the lower your cold idle will be and the sooner (temperature wise) your high idle will end. Reinstall.

i was looking for that on here but couldnt find it, did see one over on honda no-tech but didnt trust it

the grand wizard has spoken, off to remove the FITV once again

speedjunky01 · « **Reply #16 on:** August 26, 2009, 01:24:51 PM »

comrade Yoseph i require more hand holding, if you could spare a few minutes it would me much appreciated .

so i took off the little plate on the side of the FITV off and turned the metal plate as far as it could go clock wise and re-tightened the screws.

when i took off the metal plate there was a little green plunger or w/e i tried to turn it but couldnt, when reasempling i used a bit of RTV silicone on the metal plate to make sure it can seal, any other ides?

or am I retarded and the thing i was supposed to tighten is behind the green plunger

Joseph Davis · « **Reply #17 on:** August 26, 2009, 02:04:07 PM »

You actually turn the seat that the plunger comes to rest against - it's threaded on the outside and screws down the threads inside the FIT-V's body.

speedjunky01 · « **Reply #18 on:** August 26, 2009, 02:49:26 PM »

Quote from: Joseph Davis on August 26, 2009, 02:04:07 PM

You actually turn the seat that the plunger comes to rest against - it's threaded on the outside and screws down the threads inside the FIT-V's body.

this is an auto FITV not sure if that helps, im really now getting it JD sorry, normaly im pretty good about fallowing directions.

loking for a diagram so you can point it out to me

best i can do so far, its number 2

Joseph Davis · « **Reply #19 on:** August 26, 2009, 03:30:58 PM »

Well, fuck. You're OBD2, no FIT-V.

Look for vacuum leak.

speedjunky01 · « **Reply #20 on:** August 26, 2009, 03:39:23 PM »

Quote from: Joseph Davis on August 26, 2009, 03:30:58 PM

Well, fuck. You're OBD2, no FIT-V.

Look for vacuum leak.

it must be leaking around the FITV whenever i plug the hole with the finger on the valve it idles like a champ, i think im just gonna hit the bottom of if with some RTV sealant and pray a little

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Author Topic: idle issues (Read 6194 times)

chris

chris