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2006 ford freestar with a 4.2, has a popcorn popping sound coming from the intake at idle

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: antitheft and battery lite on 2006 ford freestar

Try your spare key first. also, does the anti theft visual indicator (red flashing light) prove out, that is light for three seconds when key is turned to on.

here's some info.

Principles of Operation
The passive anti-theft system (PATS) uses a specially encoded ignition key. Each encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique electronic identification code out of over 18 billion, billion combinations.
The passive anti-theft system (PATS), also known as SecuriLock ®, uses radio frequency identification technology to deter a drive-away theft. This system is known as SecuriLock® in North America, Safeguard® in the U.K., and PATS in continental Europe. Passive means that it does not require any activity from the user.
The SecuriLock® System (PATS) is not compatible with NON-FORD remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. If equipped, the remote start system must be removed before investigation of PATS-related, no-start issues.
Each encoded ignition key must be programmed into the vehicle's powertrain control module (PCM) before it can be used to start the engine. The correct ignition key is a different design than prior model years. Consult the Rotunda Key Ordering Guide for the correct part number. There are special diagnostic repair procedures described in this section that must be carried out if a new encoded ignition key is necessary.
This system contains a new feature named Unlimited Key Mode. This feature allows a customer to program more than eight keys to the vehicle if they request it. Each vehicle in Unlimited Key Mode is set up with a special unlimited transponder security key. This allows all the customer vehicles to share the same keys, but no other keys from outside can be used to operate the vehicles. For an individual customer, any randomly selected security key is acceptable. Refer to Unlimited Key Mode Programming in Key Programming Switch State Control in this section.
The PATS transceiver module communicates with the encoded ignition key. The module is located behind the steering column shroud and contains an antenna connected to a small electronics module. During each vehicle start sequence, the transceiver module reads the encoded ignition key identification code and sends data to the PCM.
The control functions are contained in the PCM. This module carries out all of the PATS functions, such as receiving the identification code from the encoded ignition key and controlling the engine enable. The PCM initiates the key interrogation sequence when the vehicle ignition switch is turned to RUN or START.
All elements of the PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start.
PATS uses a visual theft indicator. The indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS concern, this indicator will either flash rapidly or glow steadily when the ignition switch is turned to RUN or START. The PATS system also flashes the theft indicator every two seconds at ignition OFF to act as a visual deterrent.
PATS will be activated and will disable the vehicle from starting if there is:

  • an incorrectly encoded ignition key.
  • a damaged encoded ignition key.
  • an unprogrammed key
  • a non-encoded key (key has no electronics).
  • damaged wiring.
  • a damaged transceiver.
  • a damaged PCM.

Posted on Jan 09, 2009

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SOURCE: engine light stays on replace intake manifold

I would take a look at the idle air control valve and see if it is sticking. You could try taking it off and cleaning it. If that seems to make a difference then I would replace it with a new one just to be sure.

Posted on Jun 07, 2009

SOURCE: How to dain radiator 2006 ford greestar 3.9L

ford freestar 2004 trac off message comes on sometimes while travelling and then go off when you stop the engine

Posted on Sep 06, 2009

  • 599 Answers

SOURCE: my 2006 f250 pops in and out of 4 wheel drive by

if the front axel seals are starting to leak this could be the problem,very common. the 4WD on this vehicle uses vacuum to make the system work=leakings seals low or no vacuum no 4WD.get back to me if you need more help,PLEASE rate my fix as i strive to be the best Thanks Ray

Posted on Feb 10, 2010

  • 1 Answer

SOURCE: have a 2007 freestar thats has a popping noise out

its your mass air flow sensor. the air filter housing does not seal well, wich causes dirt and turbulance to (MASF). So your vehicle will begin to run richer, making a popping noise. then the vehicle will start to jump while driving or even stall.

Posted on Feb 25, 2010

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Need the code PO722 for a 2006 ford freestar 3.9


Hope, code PO722 Output Speed Sensor No Signal.
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http://www.autozone.com/repairguides/Ford-Freestar-Monterey-2004-2006/Diagnostic-Trouble-Codes/4-2L-V6-VIN-2-Auto-5/_/P-0996b43f802e829c

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Replace intake manifold runner on 2005 FordFreestar


Warlock61 is a genius!!!
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Have a 2007 freestar thats has a popping noise out of the throttle body thats sounds like popcorn popping. doesn't affect it running though.


its your mass air flow sensor. the air filter housing does not seal well, wich causes dirt and turbulance to (MASF). So your vehicle will begin to run richer, making a popping noise. then the vehicle will start to jump while driving or even stall.

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Engine light stays on replace intake manifold plugs fault codes with pcm lean idle condition ford 2005 freestar


I would take a look at the idle air control valve and see if it is sticking. You could try taking it off and cleaning it. If that seems to make a difference then I would replace it with a new one just to be sure.

Apr 18, 2009 | 2005 Ford Freestar

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