I replaced the common knock sensor on my 2004 f150 on passenger side under manifold,where is other knock locatede

SOURCE: engine knock on 2004 f150

havent heard that one before 4 a knock .Think i would look at a diffrent one.

SOURCE: Vaccum hose diagram for 97 chevy tahoe 5.7 liter

I have the diagram you need. If you send me your email I will scan it off and send it to you. [email protected]

SOURCE: Replace Passenger Side Mirror on 2002 Ford F-150

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Then you can access the bolts that secure the mirror onto the door

SOURCE: 2004 Ford F150 5.4l XLT 4x4. P0174 - Can't resolve! :(

Short of actually getting my hands on your truck to do the diagnosis myself... These are the things I can think of off-hand that would cause your P0174 and not necessarily set other DTCs.

- A faulty upstream Bank 2 O2 sensor or wiring (though you already have this base somewhat covered and Ford O2 sensors are tough, usually don't see failure except in cases of contaminated fuel or excessive use of over-the-counter fuel additives)

- A bent, disconnected, or broken Intake Manifold Runner Control rod or butterfly assy on Bank 2

- An exhaust leak on Bank 2 (esp. since you mentioned headers)

- An intake manifold leak either at the gasket or injector o-rings on Bank 2

- A weak or partially stopped-up injector(s) on Bank 2. Though I find this unlikely since you mentioned there was no misfire.

- A plugged or restricted Catalyst on Bank 2. Also seems unlikely given that you do not experience misfire or low power concerns.

- A faulty Powertrain Control Module. This option, though not unheard of, is VERY unlikely in my experience with these trucks.

If I think of anything else I will let you know. I wish that I could help more, remote diagnostics without all the needed tests and information on a problem such as this amounts to little more than conjecture.

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SOURCE: Where is a knock sensor located on a 2004 ford

If it has one it's on the back of the block at the top it depends on what engine you have but most of them are a 5.4 or 4.6 or 4.2 and those have the knock sensors under the intake manifold on the passenger side. right behind the intake