Question about Ford Freestar
The knock sensor is installed in the lower forward area of the block on an OHC V6 engine.
I believe another option to the knock sensor is the "Mass Air Flow Sensor" That would be easy to see from the top side of engine on the Air Inlet tube on the Throttle Body.
Posted on Oct 20, 2016
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Posted on Jan 02, 2017
i will try to help. 171/174 indicates lean condition in engine. the mass air flow sensor is located in the rubber tube going to throttlebody. you can try to clean it. using mild carb cleaner safe for sensors, remove sensor from tube. spray clean the tiny wires located in the cylinder. do not touch them, they are very delicate. these engines are also notorious for leaking intake gaskets and faulty pcv valves. these will all set these 2 codes. feel free with anymore questions.
Posted on Nov 15, 2008
It is underneath the van on the driver's side near the rear edge of the driver's door. Follow the fuel line coming out of the gas tank to it. It's about the size of a coke can, If you have not picked up the fuel filter yet, Auto Zone will have it and can give you the step by step instruction to get the job done and can lone you the quick release wrench for the fuel line to the fuel filter. Good luck and keep me posted. Be glad to help.
Posted on Jun 20, 2009
Under intake manifold on top of block,you need to remove intake to access sensors there are two of them you can't miss them when intake is off. After replacing sensors you need a new intake gasket.
Posted on Apr 04, 2010
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