engine idle? Options

[trdcelica99]

i noticed when i was sitting at a light that my engine was idling way high, it was almost at 1500 rpms, i know i can take to my friend and get my friend to adjust with his scanner, but i was wondering if anyone had any ideas why this started happening?

[Coomer]

Did you just start your car and was it cold out? I know that when I start my car it idles high while the engine warms up.

[1bwilson]

Mine used to do that all the time. All you have to do is loosen the throttle cable some and it will go down.

-Bryan-

[trdcelica99]

it just got cold in florida lately, so i'm hoping that's it, thanks for the info guys!

[96cel_John]

whats the normal idle rpm?

[1bwilson]

QUOTE (96cel_John @ Nov 19 2002, 08:03 PM)

whats the normal idle rpm?

I'm around 500 rpm's.

-Bryan-

[macavely]

damn i'm starting to think that there is something wrong with mine, cause i'm around 1500 and 2000 rpms. I need help with this guys.

[Coomer]

QUOTE (96cel_John @ Nov 19 2002, 08:03 PM)

whats the normal idle rpm?

I'm close to 900 rpm. I haven't messed with my throttle cable or anything.

[SmokeThis]

the engine is supposed to run a high idle when its cold. there's actually a name for the program with in the ECU that does this, but i forgot it (stupid). but 1500-2000rpms is really high. mine goes up to 1400rpms on a really cold day. i'll try to find out what toyota calls this automatic idle adjust again.

[trdcelica99]

750- 900 rpms but i'm in warm weather

[jontechie]

QUOTE (1bwilson @ Nov 19 2002, 08:09 PM)

QUOTE (96cel_John @ Nov 19 2002, 08:03 PM) whats the normal idle rpm? I'm around 500 rpm's. -Bryan-

Damn you must have one laid back engine, I think the standard is 700-800 rpm after warm up (1000- 1500rpm at a cold start)

[jontechie]

QUOTE (SmokeThis @ Nov 21 2002, 01:18 PM)

the engine is supposed to run a high idle when its cold. there's actually a name for the program with in the ECU that does this, but i forgot it (stupid). but 1500-2000rpms is really high. mine goes up to 1400rpms on a really cold day. i'll try to find out what toyota calls this automatic idle adjust again.

Yeah I think it's called an Idle Air Control program for the
IAC Valve, it bleeds air away from the throttle and so controls the idle according to coolant temp etc.
It was the first thing that was checked when I had a jumpy
idle on my first Celica.

[macavely]

I asked my uncle to check my idle for me and he did something under the hood i don't know what but now it's at 1000-1100 one cold then drops to 600-700.

[jontechie]

That sounds about right to me...

[NEVERSTOP]

Your throttle cable is loose!

This is very BAD!

to correct this you will need two open ended wrenches... I think they are 12mm but not sure... been a while since I have worked on a 5sfe.

Open your hood... you need to find where your intake manafold is.. on GT's its the thing that says 2200 at the top of you motor and close to the fire wall. Not sure what the ST looks like.

attached to the front of your intake manafold will be two black cables... they connect to your throttle... The top one is your throttle return cable and the bottom one is your actual throttle cable.

There will be a mounting bracket attached to your intake manafold that will have two aluminum nuts that the throttle cable runs threw.

If your engine is running too high you will need to loosen the nut on the left/passanger side of the bracket.

If your engine is running too low you will need to loosen the nut on the right/driver side of the bracket.

Slowly adjust the nut with the car running.... do not do this TOO fast... keep checking the RPMs until your car shows 700-900rpm...

once the Idel is set you will have to tighten the other nut down so that both nuts are REALLY tight on the bracket...

DO NOT GET THE BRIGHT IDEA TO INCREASE YOUR IDLE.... this will make your car faster off the line but will cause all kinds of problems!!!!!