Question about 1998 Ford Expedition

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Locating the knock sensor on a 1998 ford expedition

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  • Ford Master
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It is under the intake manifold see picture below, it is the green part in center of engine valley between the heads.
locating the knock sensor on a 1998 ford expeditio - 11_5_2012_11_38_19_pm.jpg

Posted on Nov 05, 2012

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6ya6ya
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Posted on Jan 02, 2017

  • 27 Answers

SOURCE: Oxygen Sensor Location 2001 Ford Expedition Eddie Bauer

There are four o2 sensors on this truck. one on each side just below the exhaust manifold, and one on each side behind the second catalytic converters. (just about even with the back of the front doors.

Posted on Jun 18, 2008

blueextc3221
  • 15935 Answers

SOURCE: o2 sensor location

DTC P0156 indicates the output voltage of the downstream Heated Oxygen Sensor (HO2S) is less than some calibratable functional window. The possible causes are:

  1. Pinched, shorted and/or corroded wiring and pins.
  2. Crossed sensor wires
  3. Exhaust leaks.
  4. Contaminated HO2S.
  5. Bad HO2S.
Since you didnt specify the engine size in your vehicle - please see the diagram below for the location of the sensor(s)

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Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Posted on Apr 16, 2009

cobra777
  • 80 Answers

SOURCE: fuel pump reset button location 1998 ford

It is on the front passenger side, under the side panel. Hope this helps.. Cobra :-)
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Posted on Jun 13, 2010

  • 6 Answers

SOURCE: Location of Speed Sensor 1998 Ford Explorer XLT

polarcycle is right but there is a speed sensor on the drivers side top of the trans. toward the tail shaft or transfer case. there is as well a sensor inside the trans. itself that is mounted on the web. behind the overdrive band and drum.

Posted on Jul 11, 2010

ZJLimited
  • 17970 Answers

SOURCE: need routing diagram for 1998 ford expedition

Check this...

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Other details can find in 1998_ford_expedition_drive_belt_routing_diagram

Hope helps (remember comment and rated this).



Posted on Jul 22, 2010

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1 Answer

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Hello adamjerkins,

It is somewhat complicated to change the knock sensors. There are two of them and they are located under the intake manifold. The intake manifold must be removed. I would recommend tha you replace both while you have the engine apart.

What leads you to believe the knock sensors are bad, I've seen few bad knock sensors? The knock sensor issues more times than not have been caused by other problems.

After you remove the intake manifold disconnect the knock sensor connectors. Remove the bolts and the two knock sensors then replace with new knock sensors tighten the bolts to 15 foot pounds. Reinstall manifold. The total job for an experienced mechanic with tools is about 5 hours. Not a good job for a beginner.


Regards,
netvan

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a91cb92.jpg

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