Question about 2002 Honda S2000

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Honda S2000(uk) idle adjustment method.

Idle too high, 1200rpm hot. How can this be lowered to 900rpm.

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Posted on Jan 02, 2017

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SOURCE: 1989 honda prelude enigne idles high then low irratic

I had the same problem on a Rover. There was a leak in inlet manifold that was caussing the problem.
To verify, spray some sealant to temporarily seal the inlet manifold .and the eratic idling should disappear for some time.
If it does, you know there is leak in inlet manifold which you can take of and refit with a new gasket.

Posted on Oct 27, 2008

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SOURCE: 1995 honda civic idle problem

iac valve or tps

Posted on Apr 21, 2009

  • 1 Answer

SOURCE: 1986 Honda Accord DX - too high idle on cold start

1986-1989 Honda Accord with Carburetor have a very bad habit that is little known even by most mechanics but easily fixed at home. The vacuum port on the choke opener that is connected to the intake manifold and both vacuum ports on the fast idle unloader get plugged up with nasty hard carbon almost as hard as metal. When this happens the choke sticks closed and the idle sticks on fast idle when the engine is cold and nobody can figure out why. All you have to do is attach a small drill bit to the end of a flexible socket-driver extension and put it in a variable speed drill that will let you run it real slow and carefully drill out the vacuum ports that are plugged. After they are nice and clean use a vacuum pump tester to make sure the choke opener and fast idle unloader are working before putting it all back together. It's amazing how much better the car runs after cleaning out those ports.

Posted on Sep 27, 2009

SOURCE: low Idle

Air Idle Control. No screw

Posted on May 31, 2010

  • 142 Answers

SOURCE: How to Adjust idle RPM for a 2003 honda accord. some people were talking about a screw on the throttle body. but I can't find that screw. How do you go with adjusting this and where to find it ?

First, you shouldn't adjust the idle. If the idle isn't correct, that means there is an issue somewhere - not that the idle needs to be adjusted.

There isn't an adjustment screw. To adjust the idle, you will need to move the TPS (Throttle Position Sensor) forwards or backward. To do this, you will need to remove the tamper proof bolt and replace it with one that can be loosened and tightened.

Posted on Mar 04, 2012

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03 ford escape idles at 1200rpm. cleaned iac replaced bank 2 sensor 1 o2 sensor vacuum lines plugs and intake gaskets cleaned tb iac . runs great 187,400. rpms drop to 850 when ac on. fluids good.


High idle is most often caused by an engine vacuum leak, use a can of carburetor spray and spray it around the intake manifolds (upper and lower), if there is a leak you will hear a change in the idle speed

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1 Answer

How to adjust idle?


hot engine ?, cold or both,, EFI runs in 3 modes, cold ,warm and hot.

name it.

which engine option (displacement)??????



there is no idle adjust, that is the PCMs, job 100%, all the time.

Carbs are gone.

here is rule one for all EFI.

idle is the last thing to work correctly.

anything the causes a gross imbalance of engine power to engine load, under idle will cause , idle controls to fail.



low idling causes. (over 50 but, here ar basics)

1: AFR (air fuel mixture too lean) usually surges. (clogged or leaking injectors. or fuel pressure way to high)

2: air leaks, cause racing, so not that. (speed density car ,if is)

3: egr stuck open. low idle and misfire.

4: ISC stuck closed (IAC electric)

5: cam belt slipped, timing retarded, compression at 1/2 spec, and well, valve will bend soon....

6: CEL glowing running? can be in limphome, limp cancels Idle controls (in may cases) RTM read the FSM on DTCs.



if fails hot?, is hot = 180F temp or more? "thermometer time"

if not, the PCM goes , quite nuts.

Dec 23, 2013 | 2010 Honda Civic LX

1 Answer

High idle rpm + hyundai santro


run the fault codes before you waste any more money as there are several sensors that will cause high idle.

Jul 17, 2013 | Cars & Trucks

2 Answers

High idle


turn idle screw down. this car may have an electric or vacume controlled idle. get a new motor for it. look on the throttle plate to make sure the cables are on correctly

Mar 15, 2013 | 1983 Honda Civic

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My 99 dodge durango idles @1500 when i start it then when i rev it up past 2000 it stays idling @ 2000


Check for vacuum leaks, this is a common problem on the durango. Unmetered air enters the engine and creates a high idle condition.

Aug 21, 2011 | 1999 Dodge Durango

1 Answer

Idling bad especially when it's hot and in a heavy traffic-stop &g.o idle fluctuate when I stop between 700 to lower than 500. Is it bad idle control valve?


thats far to low for idleing you need to bring that up to 850-900rpm the valve may be faulty but try to tune it first,,,thats the cheaper of the two

Aug 08, 2010 | 2003 Toyota Sequoia

1 Answer

What is the correct factory warm idle R.P.M. on a


It should be around 900RPM. But you are not supposed to adjust it on the throttle body. The computer does this by manipulating the idle air control valve.

Mar 14, 2010 | 1988 Chevrolet S-10

1 Answer

Rough idle with check engine light


Usually a rough idle on a Honda is a result of the idle speed being too low. What is your RPM suring idle now. Try to increase it using the screw on the idle air control by only a quarter turn at a time. Hope this helps.

May 09, 2009 | 2002 Honda S2000

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