Idle problem!

[Doch-vtec]

Hey guy my idle is playing up at cold start it idle around 1000rpm then as it heats up it doest go down it goes up more up to 3000rpm i have to turn off the engine for it to go down then it runs normal around 800 to 700 rpm and when its running as i slow down to the stop light it goes up again to 1500rpm have to be full stop for it to go back to 800rpm. Any idea what could be the problem? The engine is a jdm b18c.

Hers a list of what i have done so far...


Clean tb
Clean iacv
Spray tb cleaner in intake manifold gasket with no luck. ( for leaks )
Check for vaccum leaks
Loosen up the throttle cable


Please help..:(:(

[Jasemas]

Checked the FITV?
And when was the last time you bled your coolant

[Doch-vtec]

Checked the FITV?
And when was the last time you bled your coolant

Tnks jasemas i dont have a fitv i only have iacv.

Yes i bleed the coolant system when i took off the iacv coolant came out the hose so i top it off and bleed it again

[JayTea18]

Watch this video :
http://www.youtube.com/watch?v=L788jKEVblY

It might help

[JayTea18]

Im doing some research right now.
-Mechanic told me i have to replace my IACV.

Just to save time:
Brand new IACV
http://www.autodynamics-honda.com/idaircova.html

Used:
http://www.hondworld.com.au/
Email these guys i got quoted $45

[Doch-vtec]

Watch this video :
http://www.youtube.com/watch?v=L788jKEVblY

It might help

Tnks jaytea yea ive seen this guy but the engine that he showing is different from mine the one that he is doing has a fitv and mine hasen't got one yea maybe ur right it might be the iacv cuz thats the only thing that i got on my engine.

[dougie_504]

Im doing some research right now.
-Mechanic told me i have to replace my IACV.

Just to save time:
Brand new IACV
http://www.autodynamics-honda.com/idaircova.html

Used:
http://www.hondworld.com.au/
Email these guys i got quoted $45

Maybe $45 for a used one, or a new inner gasket.

Expect to pay $200+ for the real deal.


How did you clean your current one?

[Doch-vtec]

Maybe $45 for a used one, or a new inner gasket.

Expect to pay $200+ for the real deal.


How did you clean your current one?

It started when i took off the tb and clean it spray som tb cleaner on it and let it to dry for abit then i took out the iacv to and clean it as well with tb cleaner and let it dry i figure since i took out the tb minus well clean the iacv.

The reason i did that is because my idle is always sitting in 1000rpm i try adjusting the flat screw on top of the tb with no luck and think that the iacv is dirty so i took it off and clean it but before it was alright when im driving once i step on the clucth the rpm drops wer it sopose to be but now one i step on it it goes up to 1800rpm i have to be fully stop before it goes back to 1000rpm.

I tried bleeding it many times but still no luck.

Please help...

[Doch-vtec]

Anybody?

[Doch-vtec]

Bump...

[Doch-vtec]

Anybody?

[Doch-vtec]

Is possible cuz i sand down the hole of the tb wer the butterfly sits cuz ders alot of black stuff dat wont come off.
Could dat be the reason why my idle is going wild?

[Jasemas]

Is possible cuz i sand down the hole of the tb wer the butterfly sits cuz ders alot of black stuff dat wont come off.
Could dat be the reason why my idle is going wild?

probably letting more air through then needed
so the iacv may adjust the amount of air that goes into the A/F ratio
but by having a hole there there is more air then the ecu has taken into and tries to compensateso you go a fluctuating idle
just a possible cause

While we are on the subject
What else have you done to the car that you have not told us about?

[Doch-vtec]

Thats all i did. I still got my old b16 engine and i try putting the tb in it with no luck. The car got worse so i put back the old one. Lol... Is it possible ive make the hole bigger by sanding it down even if the sand paper ive use is an use 1000 sand paper?

[Doch-vtec]

Anybody?

[shepparton]

Check for vacuum leak,, small leak would make idle problem

[JayTea18]

Dont worry im having the same problem.

Ive done everything you have + replaced my IACV

Im gonna check this out after work:

-http://www.ozhonda.com/forum/showthread.php?51798-Replaced-IACV-and-Still-High-revs-FIXED-!!&highlight=IACV%20FITV

[JayTea18]

http://www.ozhonda.com/forum/showthread.php?51798-Replaced-IACV-and-Still-High-revs-FIXED-!!&highlight=IACV%20FITV

[Doch-vtec]

Check for vacuum leak,, small leak would make idle problem

Thanks mate ive tried spraying all the vacuum hose tb and IM with no luck tho

[Doch-vtec]

Dont worry im having the same problem.

Ive done everything you have + replaced my IACV

Im gonna check this out after work:

-http://www.ozhonda.com/forum/showthread.php?51798-Replaced-IACV-and-Still-High-revs-FIXED-!!&highlight=IACV%20FITV


Thanks mine hasent got the fitv tho

[JayTea18]

Same here

Im using skunk 2 throttle body - 68mm
(Pro series)

My last options are:
- Checking the 2 SENSORS on the throttle body.
- They might need a clean

I feel your pain man,
Hating my car at the moment.

http://www.ozhonda.com/forum/showthread.php?120191-Calibrating-the-Voltage-on-the-TPS

[Doch-vtec]

Same here

Im using skunk 2 throttle body - 68mm
(Pro series)

My last options are:
- Checking the 2 SENSORS on the throttle body.
- They might need a clean

I feel your pain man,
Hating my car at the moment.

http://www.ozhonda.com/forum/showthread.php?120191-Calibrating-the-Voltage-on-the-TPS

Amem everytime im on the road and another car comes beside me they keep on looking at me cuz they thought im reving my car at them i always end up sliding down on my seat so they wont see me. Lol... And they always took off really hard.��


I was thinking of doing that. Changing the tb i was thinking of skunk2 alpha series any feed back on them?
And where can i get one? Cheers��