Hey Guy's, I pulled a po325 code so I purchased one of 2 knock sensors and got a location printout from Ford. It shows them behind the fan pully under the intake.So I removed the airfilter,housing over the intake,altinator and the coolent deal under the altinator, and to my surprise I found the (2) treded screw holes ( bank one and bank two) but no knock sensors had been factory installed. Is this a normal occurance?

Thanks, John

 

Were the threaded screw holes open or plugged? I would have thought that if the engine was missing knock sensors you would have had codes all along. Are there pig tails there for knock sensors? Not sure what the P0235 code is, but I'm guessing that our engines may not have a knock sensor. If you purchased this vehicle used, maybe previous owner had work done and shop never re-installed them.

 

Its hard to believe the factory wouldnt have installed knock sensors in this day and age...?

Flash

 

Truck has 120,000 miles Iv owned since new. Cam phazwers at 28k under warrenty is the only work done on truck. Code po325 is knock sensor code.Two tredded holes only ,no markings from previos attachment. I called ford and thay said that halfway threw production thay may have desided not to put them in. ???. All manuals show sensors.

John

 

Oh..I see its a 2004 like mine. Hmmmm?

Flash

 

The sensors are further back on the block. You have to take the intake off to see them. there are 2 of them. Most common cause of failure I have seen is the wire harness is routed outside of the IMRC rods whenever someone works on it. The wires are supposed to come between the intake and IMRC rods but it's harder to connect them like that.

 

could one of you explain what a knock sensor is im just curious

 

http://wiki.answers.com/Q/What_does_a_knock_sensor_do