zero708970

I have a CEL come up, I replaced the IACV and the CEL came back on after only a day, before I installed new IACV I cleaned it out with carb cleaner, whenever I reset ECU it works fine for about a day. When the CEL comes out the car sputters while driving and not pressing the throttle. Any ideas?

zero708970

Bump...

LeoSi

what cel is the ecu throwing? like what code

zero708970

I'm pretty sure it's code 14, I'm not sure because I checked it a while back but it's whatever the IACV code for the CEL is. also my idle is sputtering whenever the light shows up...

dth0ng69

adjust the idle screw.

heeltoehonda

maybe the FITV? wouldn't hurt to check

zero708970

I had read in other posts that this engine doesn't have a FITV and I've tried adjusting the idle valve and nothing : ( ..any other suggestions?

heeltoehonda

Yeah your probably right, I've never worked on a single before.

If you tried cleaning the IACV. And that doesnt help then adjust the idle screw. Still doesnt help check to see if the throttle cable is to tight or check if you have a vacuum leak some where. And if that still don't help try adjusting your dizzy back and fourth. Though most likely your timing won't be it. But you never know

zero708970

That's about the only thing I haven't done, how do I check for a vacumn leak?

heeltoehonda

Buy a can of break or carb cleaner and spray every vaccum hose under your hood. If your idle changes when you hit a certain hose then you have a leak in that hose

zero708970

So I have to disconnect the hose, and while it's disconnected i spray it and the idle should change if it has a leak or should i disconnect the hose, spray it and then connect it again and then if the idle changes it has a leak?

zero708970

bump...

shogee

no just spray leave everyting connected and spray it around the hoses, gasket and manifold, if the engine wants to run good youve found the vacuum leak

zero708970

I see....will try tomorrow!

TUR3Ovtec

DAMN thats exactly what my girls car is doing now... my code it was throwing up was P0505 i think it was.... did u change the IACV to a new one or used? I bought one brand new from ebay OEM for about 140. It should be coming in this week hopefully that fixes the problem!

heeltoehonda

Yeah don't disconnect the hose. That won't tell you anything. All your doing is looking for a crack or hole in one of the vaccum hoses, also you can spray it on your T/B or I/M gasket to see if there's a leak in one those. When you hit the right spot the brake cleaner will clog the hole and your idle will change for just a few seconds, then when it evaporates, it will go back to the way it was. And that's where your leak is.

Luserkid

Moving the idle screw, or cleaning the FITV will not fix the IAC code. If your throwing a code 14 then there is either something wrong with 1. IAC, 2. wiring or 3. ECU. Check your wiring, then the ECU.

heeltoehonda

zero708970

New symptom, I disconnected the battery so that I could clear the CEL. Obviously code is gone for now, so I turned on the car, let it warm to op. temp. and started spraying carb cleaner. When I sprayed it where the intake manifold meets the head close to the injectors the idle would lower for a bit. also the idle will not go below 1500 RPMS I'm thinking new gasket? could this be the vacuum leak?

Luserkid

What I wrote was a general for others who read this thread later on. Some motors have FITV and others dont. When your car has a fluctuating idle (with no code) THEN cleaning the FITV might help. Not when theres a code.

Has the intake manifold ever been taken off before? Could be a vac leak from a ripped gasket, but i havent seen a code due to a bad gasket. Car idling have the intake taken off and cover the top hole, does the car die or stay on?

heeltoehonda

Oh I gotcha. I suggested cleaning the FITV and that's the reply I got. I didn't know D16's didn't have a FITV.
When I had a fluctuating idle, cleaning the FITV fixed the problem on my LS

Keep us updated, I'm curious to know what it is

zero708970

will try covering intake tomorrow..I'm done with working on the car for the day...

zero708970

Problem is finally fixed, turns out it was the intake manifold gasket, i put a bunch of gasket make in the space between the head and the manifold and let it dry over night and everything is back to normal...this is only a band aid i will replace the gasket pretty soon...

heeltoehonda

Glad to hear it's fixed. So your not throwing a CEL anymore?

zero708970

No CEL usually when i would reset the ECU the car would throw a CEL by the time I got halfway to work...the car is idleing at 750 again and is no longer making the RPM go up and down constantly...