When starts idle to high? - 1988 Nissan Sentra 2 Door

What is to high? 2000RPM, 2500RPM? Also cold idle and start up idle and many other factors vary with make, model and type of engine, smaller engines in most cases need a high start up idle.

Long High idle after start up - YotaTech Forums

www.yotatech.com/f116/long-high-idle-after-start-up-246386/

Dec 20, 2011 - aviator's Avatar ... When the high idle is no longer needed the piston retracts and the throttle ... Sometimes the piston gets gunky and slow to react... clean the ... you are already idling higher then normal the idle up will only be worse... for ... it takes to kick down when I first start it up, high idle is at 2200 RPM it ...Missing: lincoln

High idle at start up - F150online Forums

www.f150online.com/forums/v8.../306364-high-idle-start-up.html

Oct 27, 2007 - ... King Ranch · Lightning · Lincoln Blackwood & Mark LT · SuperCrew · SVT ... my 2000 when its been sitting goes up close to 2k then drops down in seconds. ... so what your saying is when it's cold outside I can expect it to start andidle at 2200 rpm. sounds pretty off to me. ... Vehicle: 2004 Ford F150 5.4L. 4.6l Intermittent High Idle. Why?
Jul 12, 2005
Dual remote oil filters????
Jun 29, 2001
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Hi Alexandra, Im AL the owner of Big As Auto Repair

There are several things that can cause high idle, but the 2 most common problems are as follows.

(1) You could have a vacuum leak somewhere on the engine. Here is how to check for that issue. Here's what I want you to do: Buy a can of CARB Cleaner and while the engine is running spray around the Intake Manifold, the manifold is the thing the throttle body sit on. Also spray around all the vacuum line as well. If while spraying there is a change in the idle speed then you have found your leak. If there is no change then move on to step 2.

(2) Sometimes when you have a high mileage vehicle parts begin to ware out or can also begin to stick in place. Here something you can check. Idle Air Control Motors can start sticking from corrosion build up and can cause a high idle issue. Here what I want you to do. Start the engine and let it idle, while its idling I want you to tap on the Idle Air Control Motor If it idles down to normal idle speed replace the motor. The motor mounts onto the throttle body and most of them are round. Once you replace it and start the engine you'll notice that its idling real high, :This Is Normal, just let it idle until the engine controller resets the idle speed to normal.

Hope this helps and should you need further help please visit my auto repair website. http://www.bigasautorepair.com/

Does it do it if you disconnect the idle air control valve ?
You need to know if its a vac leak or if the computer is making the valve open too far.

check your vacuum lines

It's probably one of two things , a vacum leak or a bad ground.

just do induction / throttle body cleaning - will solve high idle on start up

The high idle speed at start up is normal. As the engine temperature increases, the engine idle should kick down automatically. Insofar as the emissions results, if there were a problem, the check engine light should be on. If it is, take the car to an autoparts store and have the fault codes read. Most parts stores will perform the scan for free. If the check engine light is not on, and the idle question was all you were worried about, you are good to go! Hope this helped and best wishes.

check your IDLER

check the idle air motor it may not be closing properly