Question about 2002 Ford Mustang

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Its idling high for a few seconds before its goes back down and then sounds low

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Throttle pos sensor

Posted on Oct 24, 2009

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I have a 2002 LW200 wagon with L61 Eco-tec. I installed rebuilt engine. Put back old IAC. I checked pintal to make sure it was 20MM. Engine starts great but idles at 2300-3000. After a few seconds the...


throttle position switch sounds like getting false readings to computer,
incorrect volts or excessive play from the throttle plate or sensor causes this,has to be one or the other,also check for any intake leaks from the filter to the throttle body,good luck,Gary

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My idle is a little shakey as well as very low on 1990 ford truck


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1990 full size blazer starts fine idles then dies


sounds real easy either a bad idle air control solenoid or more likley a blown throttle body gasket. to test fro a blown gasket, with engine running and cool spray carb cleaner or brake cleaner around base of tb were it bolts to intake. when it hits the bad area, should idle down and be normal for a second or 2. iac is possible,try this first since its so common and let me know

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Idleing


i have a 2001 Intrepid and mine does the same thing. I haven't found it to be anything to worry about unless it idles high for more than a few seconds.

Jun 01, 2009 | 1999 Dodge Intrepid

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My car threatens to die during idling...the rpm drops down low and then goes back to normal. It started doing this during driving too. I just had the fuel filter and a few other fuel related things...


Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Mar 29, 2009 | 2001 Oldsmobile Alero

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Idle problem


turn the idle screw down on the carburater

Feb 17, 2009 | 1988 Honda Accord 4 Door

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My 4.6 idles erratically.


try the following, if that doesn't correct it u may need to replace the air bypass valve.
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Jan 07, 2009 | 1997 Ford Crown Victoria

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High fast idle at start up.


On most newer cars there is a fast idle motor controlled by the computer that will hold the fast idle till the engine reaches a preset temp in the computer then the engine should drop down to the set idle according to specs for that car. If the oil pressure continues to stay low after the idle goes down you may need to replace the oil pressure sending unit or if worse case the oil pump.

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