have the screw in sight .
have some derrections need elaberaition.

it says worm it up
turn off loads
jumper scs? whats this?

unplug iac.
adjust to 750 i think i read?
turn off engine reset ecu plug iacv
remove jumper n let cool down
start without touchin pedel let worm up the same.
is this correct for an f22b1 vtec

 

? All I did was unplugged my iac valve, adjusted the screw till it idled about 750, then cut it back off and plug the iac valve back in

 

whoa.... what does your car idle at now with the iacv plugged in slowredsol? my guess is 1000? i'm pretty sure you're supposed to set it to about 500 with the iacv unplugged then you get the 750 idle that you are looking for when you plug it back in and it relearns everything. the 750 you guys are getting is the actual idle that you want to end with but since your idle drops if the the iacv is unplugged you want to set it to a base idle of 500.

here are the exact steps i use and they have worked perfect everytime:
let the car warm up,
unplug the iacv (its the cylinder shaped thing on the back side of your throttle body with a plug coming out of the bottom)
turn the screw until you get your idle set to 500,
plug the iacv back in,
shut off the car,
then pull out the backup fuse from the under hood fuse box for 30 seconds then put it back,
start the car and let it run until it warms up all the way without touching the throttle. now your idle is set.

WARNING!!! before you do this make sure you have the code for your radio if you have a stock one

 

Yeah, gest torn the skrew til it idols better.

 

I have a 1990 Accord LX 4AT. What if it is already steady at 750?

Thanks,

 

Umm... if its steady where it should be why would you mess with it? If the body of your car is perfect and its the color you want would you paint it?

 

Whew...go back to school and learn to spell. I should not work this hard to decipher your mess that you wrote!

 

yes, you are right, my bad, thats actually what i meant. i idled it down to 500 then when i plugged the iac back in the idle was at 750.

 

glad to hear you did it the right way. its kind of a pain to do it over and over again (roaming idle is a B**** and doing this at the end of every step didn't make it any better)

 

Hello!
I am new on this forum, and I have prety much the same idle adjustement problem.

My Honda is a 1999 Accord 1.8 VTEC (engine code F18B3). It idles at about 500 rpm or less and at cold it is difficult to start it unless I keep pressing on gas for few minutes. So I guess the FITV is not functionning properly.

I searched on the net and on some manuals and foud out that idle is adjusted by the IACV, but my throttle body does not seem to have one! or I'm just unable to locate it!

First here is the engine




Throttle body from the air intake side




and from the manifold side







There are only two sensors on the throttle body. The TPS and the MAP sensor. and no idle adjusting screw!
So my question is: How is idle adjusted on this kind of engines/throttle bodies?

Also, I assume this part (which is broken) is the FITV. Am I right?




Thank you.

 

Another thing, while removing the intake manifold for cleaning, i found this sensor broken (not sure if it was broken before or I may have dropped the imanifold on it and broke it!).
I could not identify what this sensor is for. It is located in the engine block right above the oil filter and below the intake manifold.









Thanks for the help.