Question about Cars & Trucks
You mean it surges. You are not using the idle circuit while driving. Investigate the speed sensor, fuel pressure, air temp sensor, and mass air flow meter.
Also is the check engine light blinking? That will indicate a trouble code is stored which should tell you the area of the problem.
Posted on Dec 31, 2013
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Posted on Jan 02, 2017
problem is nobody can fix this issue for you your vehicle needs to have the key/computer programmed so the vehicle will start.
the security system thinks that you are using the wrong key to start the vehicle.
there is how ever a quick solution if you have other keys on your key ring, remove them as they may be interfering with the signal.
if it still does not start you however will need to find a dealership to fix your issue as ford is the only one that can program keys/computer.
Posted on May 14, 2009
check for a dirty Mass Air Flow (MAF) sensor or a vacuum leak. Especially around the fuel pressure regulator. Check the fuel pressure regulator too
Posted on Aug 02, 2009
therostat. it's the hose that runs from the raideator to the top of the intake. Unbolt it at the intake and it's right there.
Posted on Jan 25, 2010
SOURCE: 98 ford explorer high idle
Its either a faulty idle air control valve or a faulty fuel pressure regulator.My bet would be the idle air control valve. If you pull the vacuum hose off the fuel regulator or the map sensor and fuel runs out then the regulator is bad.If you replace the control valve then you have to reset the computer.
Posted on Jan 14, 2012
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Apr 04, 2016 | Ford Cars & Trucks
Engine stalls cold or RPM
fluctuates at idle up and down or dies near idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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