Question about 1987 Buick Century

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Idle speed way to high - 1987 Buick Century

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Check for vacuum leak

Posted on Jul 19, 2009

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1997. Idle seems a bit high. How can I adjust it? I'm getting awesomely high mileage both city and highway but i think it could improve still more and the idling speed feels too high.


The idle speed is controlled by the engine computer through the idle air control valve , there are no provisions for adjusting idle . If idle is to high or you just think it's high , you need to test ,don't guess . Watch this video that shows what happens when you adjust thing's that you should not . Ford IAC valve test how to adjust minimum idle speed How to do it correctly !

Jan 16, 2016 | Mercury Sable Cars & Trucks

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2000 buick lesabre high idle problem, 800 warm 1300 cold-----how to fix?


The idle speeds software driven But vacuum leaks can raise idle speeds or weak mounts cause the shift in position giving you the jolt.

Apr 20, 2014 | Buick LeSabre Cars & Trucks

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MY IS IDOLING VERY FAST NEED TO USE BOTH FEET TO KEEP CAR FROM MOVING FORWARD FAST


IF YOU HAVE CARBURETOR. IDLE SPEED TOO HIGH NEED ADJUSTING. CHECK ACCELERATOR LINKAGE OR CABLE COULD BE IN A BIND CAUSING HIGH IDLE SPEED.MAKE SURE THE ACCELERATOR PEDAL FLOOR MAT NOT IN THE WAY.CHECK CARBURETOR MOUNTING BOLTS.RETIGHTEN TO MAKE YOU DONT HAVE A VACUUM LEAK BETWEEN CARBURETOR GASKET AND INTAKE MANIFOLD THAT WILL CAUSE HIGH IDLE SPEED.IF YOU HAVE FUEL INJECTION ENGINE LET A GARAGE SET THE TIMING AND IDLE.

Nov 22, 2010 | 1988 Toyota Corolla 4 Door

1 Answer

When starts idle to high?


Starts in high idle for the engine to warm up. When adjusting the throttle for idle speed, there is a screw for the high idle speed. Would not mess around with it if you don't know exactly what you're doing. The balance between the fuel and air mixture can easily go wrong.

Mar 20, 2010 | 1988 Nissan Sentra 2 Door

1 Answer

High idle speed


700 rpm or so. Have you checked for vac leaks?

Sep 07, 2009 | 1997 Jeep Tj

1 Answer

My 1997 chevy lumina is throttling too high to drive


CHECK TO MAKE SURE THROTTLE LINKAGE IS NOT STICKING.ALSO LOOK AT THE THROTTLE BODY GASKET.IF ITS LEAKING OR BROKEN IT WILL CAUSE HIGH IDLE SPEED.IF ALL LOOKS GOOD.SCAN IT.CHECK FOR IDLE SPEED CONTROL FAULT.IF IDLE SPEED CONTROL GO BAD IT CAUSES HIGH IDLE SPEED.

Aug 18, 2009 | Chevrolet Lumina Cars & Trucks

1 Answer

High idle speed when the engine is cold


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.

Jul 31, 2009 | 2002 Toyota Camry

1 Answer

High idle at start, using tremendous amount of fuel


How high is the idle speed? I know Tundras, especially the V8s have a high idle speed in order to heat up the engine because it runs better at a higher temp and also because the heat wont blow until the engine is warm

Jul 22, 2008 | 2004 Toyota Tundra

1 Answer

Idling to high


Hi jmach,

There is nothing wrong with your vehicle and no need to have anything repaired.... The high idle speed is controlled by the on board ECU...(the Electronic Control Unit).... When starting the vehicle from cold, the automatic enrichment of fuel increases the idle speed... Depending on the ambient air temperature.... the colder the weather, the longer the engine will take longer to return to normal idle speed. Thats how it's designed to operate.

Regards Johngee10

Jul 12, 2008 | 2004 Toyota Matrix

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