Irratic idle after service PROBLEM FIXED thanks ECUMAN / BEEZA etc

[I heart the SSS]

Hey guys..

I just serviced my EJ8 Coupe (D16Y8 SOHC VTEC)

The car now has a very irratic idle, aka you give it a rev, it falls down to 1,000 RPM, then goes back up to 1,500 RPM, then back down, and up etc.

I used some Subaru upper engine cleaner on the Throttle body, and drove it after to purge it out of the car. New plugs, oil, filter followed.

I read this somewhere

) Did your Throttle Body get bored out at all? Is Air bypassing the blade?

Could I have covered the sensor in the intake manifold in gunk? thus making it fail and not pick up the air readings?

[SHOGUNOVDDRK]

so its surging.
What you've stated is a possibility.

[I heart the SSS]

http://www.superhonda.com/forum/f94/...r-iacv-144463/

I think this is the issue

the IACV is clogged?

[SHOGUNOVDDRK]

Bro, can't read (on phone, lol)

give the IACV a clean up and see if that helps it

[90LAN]

justin use your subaru upper cyclinder cleaner lol
to fix this problem and to clean

[JohnL]

Unplug the IACV (i.e. electrical connector at the IACV) and see if the idle drops and / or stabilises.

[bennjamin]

chances are the upper cleaner may of clogged the ICAV - as john stated disconnect it and see if it drops or alters rpm

[I heart the SSS]

I took the IACV off, gave it a good clean with electrical contact cleaner.

I bolted it back up and still the problem is

1. Start car
2. Goes to 1500 RPM
3. Drops to 1000 RPM

*rev the car gently to 3,000 RPM*

1. Falls to 1000 RPM
2. Goes back up to 1500 RPM
3. Falls to 1000 RPM and settles.

I also removed the resonator for the intake...

any ideas?

[bennjamin]

this is while the engine is dead cold or warmed up ?
did you misplace the clip for the IAT sensor ?

[I heart the SSS]

I unplugged it then ben, the car seems to idle fine.

I reconnected it, more air began to pass through the air filter box (it sounded more ballsy as soon as i clipped it in)

And now the idle is back to be HEAPS irratic..

hmm

edit: car is warmed up.

[bennjamin]

replace or swap with known working one (off a friend etc) to confirm its the IACV.

[I heart the SSS]

Don't have any friends who drive these cars lol

****.. might see how much one is from honbits?

(the car was fine before this)