Question about 1990 Ford Aerostar
When I plug in the mass air flow sensor the engine bogs down. When I unplug it the engine idles fine. I have gotten another sensor and I am still having the same issue.
May be it was not the MAF sensor but bad connections in the wires. Have a technician check the voltage in the wires and connectors to determine if that was the fault to start with
Posted on Jul 28, 2013
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Posted on Jan 02, 2017
small emissions valve with one electrical connnector and three to four vacume lines located near your egr valve. this is a comon fault on fords emmissions system.
Posted on Aug 15, 2009
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
If there is a Auto Zone around your area, have them scan the Explorer for any DTC codes since it's fee of charge. But in the mean time buy a can of MAF cleaner and follow the instructions and also buy a can of Trottle body cleaner and follow the instructions on the can. Clean the MAF and the Throttle body, also try to get the Idle Air Control falve cleaned too which is on the throttle body. So use up the whole can of Throttle body cleaner and it would not hurt to use two cans. Once everything is cleaned that should fix the problem, the other thing to that would cause your poor idle and stalling is a bad or dirty EGR valve which can be cleaned with Carburetor cleaner since it's stronger then the Throttle body cleaner, just remove the EGR and spray the Carbon build away and place back in place. Note: the Carb cleaner is to strong for the gaskets used on the throttle body so don't use it on the throttle body. Good luck and this should help get your Explorer running 100% soon.
Posted on Jul 09, 2009
SOURCE: location of mass air flow sensor
The sensor is mounted on the throttle body between the air cleaner assembly and the air cleaner outlet tube.
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Posted on Sep 04, 2009
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