Question about 1991 Toyota Camry

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Vehicle has an unsteady idle while in Park. - 1991 Toyota Camry

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Check the throttle position sensor

Posted on Feb 07, 2012

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1995 chevy silverado cl1500: high idle @ 1800 rpm: replaced all sensors, some twice.


check all vacuum lines very closely for a vacuum leak. might be a small hairline crack that is hard to see.

Dec 04, 2013 | Chevrolet Cars & Trucks

1 Answer

2007 CHEVROLET SILVERADO 4.8 HIGH IDLE


You need to check for intake vacuum leaks. Also did you have the battery disconnected before repair, if not disconnect the neg cable for 10 minutes to reset system to base settings.

Oct 08, 2012 | 2007 Chevrolet Silverado 1500 2WD

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2004 freelander hse erratic idle in park, fine in drive


Do you know what engine scan data is ? Disconnecting sensors is not the way to find a problem ! What is the computer seeing as data input signals . Is the vehicle in closed loop fuel control , is the EGR opening when it shouldn't be , Is the PCM controlling the idle air control valve or is the vehicle drive by wire (electronic throttle control ?
005 Idle Speed Problems Idle Air Control Test
007 Idle Speed Problems Scan Data for Idle

Jun 18, 2017 | Land Rover Freelander Cars & Trucks

1 Answer

I have a 1984 ford f150. The truck idles very high when in park but when you put in drive or reverse it goes down to normal. It has duel straight exhaust on it and I wonder if that could be the prob. Idk.


you didnt say if it was happening only during the initial warm up of the vehicle or all the time. if it is just during warm up this is not too unusual as long as the engine isnt racing. if it is just a "high idle", say arround 2,000 rpm's its normal. the idle would usually go down as the vehicle reaches operating temperature. when you put the vehicle in gear, you are actually loading the engine slightly, thats why the idle comes down then. when in park the engine has no load on it so it is free to rev a little higher at these times. if it a at a high idle constantly, then i would start looking for sticking throttle cable, binding throttle plates, ect and remedy the problem. this should not have anything to do with the dual exhaust.

Mar 13, 2011 | Ford F-150 Cars & Trucks

1 Answer

I have a 1993 chevy lumina 4dr 3.1 it had a unsteady idle I replace the fuel pressure control an new plugs,wires,an still idles rough after u let off the accerator?


try not tobecome a parts replacer-buy a haynes manual instead--I believe the throttle body is filthy or an idle air valve is-there r solvents to clean this

Sep 13, 2010 | 1993 Chevrolet Lumina

1 Answer

My 97 a4 quattro audi 5 speed has been having a very unsteady rpm count while in neutral and also when put the clutch in. so bad that when i was driving and put the cluch in to downshift it stalled out.. t...


Is there a check engine light on the dash?

A rough idle on this model is often caused by a faulty idle air control (IAC) motor. This would need to be verified by a scan tool which can test the operating range of the IAC.

Jan 14, 2010 | 1996 Audi A4

2 Answers

Unsteady idle rpm


the timing is problably off. you need a timing light and you need to get the correct specs and time it accordingly

Dec 20, 2009 | 1988 Oldsmobile Cutlass Ciera

1 Answer

No codes, but stalls at idle in park once vehicle; 2.7L


most common cause for stalling on tick over is usually a vacuum air leak. check all the smaller vacuum pipes under the bonnet for leaks or perhaps one may have come off.

Sep 07, 2009 | 1999 Dodge Intrepid

1 Answer

2004 clk 500 unsteady idle rpm, could it be the


RUN down to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive for at least 100 miles and the problem should be gone. If not, one or more of your O2 sensors are most-likely fouled (lousy fuel quality these days).
Good Luck

Jun 22, 2009 | 2004 Mercedes-Benz CLK-Class

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