No sign of vacuum leak Idle problem

[wed3k]

The fitv and iacv are on the front of the IM, not the TB. And it sounds like you have a vacuum leak, still

Edit..forgot the fitv is on the tb on an a6

hes talking about the holes inside the throttle body. i looked at my h throttle body but i cant figure it out right now

[DejectedAngel]

I did bleed the coolant right. I made sure of that.

Right now the only issue is knowing if the lower hole on the TB is the fitv.
If it is then the surging stops when covering the whole with a finger.

[wed3k]

so the fitv is bad. ive changed one before to stop a high idle

[DejectedAngel]

I will be going to the JY to get one tommorow hopefully that's the problem.

so the fitv is bad. ive changed one before to stop a high idle

[dj_ender]

so the fitv is bad. ive changed one before to stop a high idle

Ok maybe I'm stupid, but how the fuck does an fitv "go bad"? Its a spring, a copper nugget, a retainer, and a plastic nut, clean that bitch, reassemble it, and tighten the nut down. Its not a sensor, there's nothing to fry. I mean the spring COULD break, or the retainer, pull it apart before you go buy another one and clean it.

[DejectedAngel]

Your guess is as good as mine. I too don't know how it went bad or is bad.
The fitv has already been cleaned twice and no change. Also the plastic screw inside the fitv is closed tight and that did not do anything. At this point in time I have done everything.I could with still having the problem.

Ok maybe I'm stupid, but how the fuck does an fitv "go bad"? Its a spring, a copper nugget, a retainer, and a plastic nut, clean that bitch, reassemble it, and tighten the nut down. Its not a sensor, there's nothing to fry. I mean the spring COULD break, or the retainer, pull it apart before you go buy another one and clean it.

[dj_ender]

Your guess is as good as mine. I too don't know how it went bad or is bad.
The fitv has already been cleaned twice and no change. Also the plastic screw inside the fitv is closed tight and that did not do anything. At this point in time I have done everything.I could with still having the problem.

If you fully tore it apart and cleaned it, along with the coolant lines, its highly unlikely its "bad" unless something was broken inside, look elsewhere for the issues. Recheck all of your vacuum lines, especially the pcv line. A member recent swore up and down his lines were good, only to look again and find a plugged pcv line, just saying... I've swore up and down about doing something, only later to realize I missed a bolt.

[DejectedAngel]

Went to the J/Y today got 2 fitv and a pcv valve. Replaced the parts and car still did the same thing.

Car is at the shop now and i hope it will get fix.

[Straight Success]

I'm having the exact same problem. The erratic idle only exist after the T-stat opens. I believe it's a vacuum leak. I state this because once in a while, I'll be sitting in traffic, and I'll feel a drastic drop in brake pedal pressure

BTW, did you figure out the culprit/solution?

[Straight Success]

Any updates?

[FAK_LAF]

Hello, here is Honda's procedure for diagnosing a fluctuating idle. Sorry for the poor scan quality on the italic text. All steps with italics ask if the car stalls except for step five, which asks if the car still runs. This check list was able to help me identify my high and fluctuating idle. It happened to be a leaking intake manifold gasket. BTW, did you spray carb cleaner on the under side of you IM gasket from under the car? Could be a leak down there. Thats where mine was. Good luck and I hope this helps.

[zubairtalpur]

hi, i'm having the problem of high idle or fluctuating idle only when i turn on the A/C. otherwise the idle stays fine. in fluctuating idle the A/C compressor also fluctuates.

DejectedAngel, was your car fixed.. what was the exact problem.

[8ball]

whats the difference between base idle and ignition idle

[93_FSWAP]

If no vacuum leaks are present and your IACV is good you might want to make sure your engine temperature sensor is working properly because if your motor is at operating temperature and your sensor is reading colder than actual temperature the ECU will advance the timing to raise the idle in order to pull in more air in an effort to raise engine temperature and therefore your idle will never come down try putting on a new temp sensor and see if that solves your problem

[Straight Success]

I'm in the same boat. It's a vacuum hose or a vacuum port nipple. Replace the hoses. There's only about a dozen or so.