2002civicrider

I was wondering where the idle adjustment screw is located on our cars. I looked all around the TB but can find it. It's a 02 civic coupe Lx D17a1.. All replies appreciated.

It Wasn't Me

Driver's side?

SHG_James

if im not mistaken, our idle is electronically controlled by the ecu.

2002civicrider

i've read where people have adjusted them before, so i dont believe it's controlled by the ecu.. I may be wrong.. But that bolt in the pic ill take a look at it tomorrow. But how do u adjust.. Untighten then adjust then retighten???

It Wasn't Me

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2002civicrider &raquo;</TD></TR><TR><TD CLASS="quote">How do u adjust.. Untighten then adjust then retighten?</TD></TR></TABLE>

Sounds about right.


Modified by It Wasn't Me at 10:59 PM 9/9/2008

SHG_James

i believe the d17s are electronically controlled. the previous d's had adjustment screws tho. correct me if im wrong tho

It Wasn't Me

I have messed with that screw before. Turning it to the right raised my idle. I didn't leave it in that position. I put it back to it's previous position where it had been marked with yellow paint.
(I was bored)

SHG_James

hmm ill go check tmrw.

skipbarber

iTrader: (1)

idle speed is set by the ecu, a solenoid controls it. the screw simply changes the amount of incoming air to the IAC. Any changes you make to the screw will most likely be changed again by the ecu, unless it's out of the solenoids range. IE. too much air flow.

It Wasn't Me

Yeah, a coworker clued me in on it this morning. He had me adjust the screw again, and leave it alone. (to prove his theory, and yours) Sure enough, the ecu set the idle back down to where it was supposed to be. Thanks for chiming in, though. Feedback is always appreciated.

Two points for jamescardenas07, as well.

2002civicrider

Thanks everyone. So from what i have gathered u cant adjust the idle because the ecu resets it.. Thanks again.

K24_Y61P

Then what is the screw for lol? I know the ECU controls idle, but why would they put a screw there?

skipbarber

iTrader: (1)

it sets base idle. it gives the car a certain amount of air when you first start it and let the IACV take over. You set it up by unplugging the IACV and adjusting the base idle with that screw. Once plugged in, the IACV will do the rest. It's pretty much a set it and forget it item.

Steve Rodriguez

I have a 2002 Honda civic ex I've been all over Google and YouTube and I'm seeing it on older cars and beginning to think my year dnt have it. My car at cold start is fine but once it's warmed up it goes up and down just a lil not bad and I took off the iacv cleaned it up put it back and it jumped real high then worked itself out but back to the normal up and down and I was looking for and wondering if my 02 civic ex has a fast idle valve?

toyomatt84

iTrader: (1)

If the idle is inconsistent when the engine is warm, its not a screw adjustment problem. Do you have a Check Engine Light active?

Steve Rodriguez

yes my check light is on buy only bcuz of my cat

toyomatt84

iTrader: (1)

That would cause the idle surging. Your secondary Oxygen Sensor is signaling the ECU to increase/decrease your fuel consumption based on its readings from the Catalytic converter.

holmesnmanny

you have a vacuum leak

find vacuum leak, fix vacuum