Reset check engine light
Disconnect battery overnight. It will clear codes if you don't have the scan tool. It may run rough for a few miles while it relearns your car's routines.
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I have a 2004 Ford Freestar and I've changed out the fuel pump filter coil pack and the oxygen sensors, but what seemed to help my van stop sputtering was a fuel rail sensor. They are only $20 on eBay but then you have to depressurize your fuel system and AutoZone rents that tool for about $120, you'll get every dime back when you return the tool.
SOURCE: replace spark plugs on a ford freestar
I have a 2004 ford freestar and it's missing a lot I changed the spark plugs and fuel filter. what else can I do ?
SOURCE: Cleaning the Mass Air Flow Sensor
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.
SOURCE: tire reset on in ford freestar
Reset without message center:
To reset turn the ignition to the ON position, depress and Trip/odometer
button (located in the instrument cluster) until “TIRE RESET” or
“CHECK TIRE AND RESET” is displayed in the odometer display window.
Once “TIRE RESET” or “CHECK TIRE AND RESET” is displayed,
press and hold the button for three seconds. The low tire warning indicator light will flash three times
as the low tire warning system begins to initialize.
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Reset with message center:
To reset turn the ignition to the ON position, press the set up button on
the message center until “SYSTEM CHECK” is displayed. Press the
RESET button until “HOLD RESET TO RELEARN” is displayed, continue to hold the button for three
seconds. The low tire warning indicator light will flash three times as the low tire warning system begins to initialize.
SOURCE: 2004 ford freestar drivebelt
All you need is a 13mm boxed end wrench. The tensioner pulley is the one all the way on the bottom towards the rear of the van. You can reach it under the van. Slide under the van in front of the passenger front tire and you will wee the pulley. Put the wrench on the bolt and pull towards you to release the tension on the belt.
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