Auto parts stores lend a kit of various sockets that should help if you attempt to do the job of replacing them yourself. The knock sensor works by sensing the vibrations in the engine, caused by spark knock. The knock sensor is under the intake manifold. Safeguards and dependability are key focuses for Mercury, a well-known vehicle manufacturer which strives for value. The total fix including the modification of the plug in is on youtube --I just put it there. Speed sensors are usually made up of a toothed metal disk mounted on a rotating shaft and a stationary detector covering a magnetic coil. Note: The starter is under the area of the throttle.
Unclamp and remove the coolant hose from the throttle body. Using the picture in Reference 1, tighten the bolts and nuts in sequence to 30 inch-pounds of torque. This method is perfectly fine and acceptable and done by anyone that is not rich. The downstream sensor is located in the exhaust pipe right behind the catalytic converter. Take out the hold down and pull straight out, a little twisting motion will help with this. Disconnect the air intake resonator tube from the air cleaner-to-intake manifold hose using the appropriate socket.
The other sensor is further back the exhaust pipe unde … r the car screwed into the intermediate or flex pipe. Unbolt and remove the knock sensor using the appropriate socket. It is this pulse frequency which the cruise control tries to maintain as a constant. I have the van for one month and then completely out of the blue driving down the road one day the van starts jerking like it has become possessed. Remove the bolt from the fuel tube mounting bracket. Once a noise is detected, the knock sensor sends a signal to the cars computer which in turn will retard the timing at 2 degree intervals until it corrects the issue.
I do also know that the knock sensor is not cheap either. As it requires considerable disassembly and an expensive new gasket set to reach it, I suggest you make very sure there is something wrong with it first. Loosen the clamps on the upper radiator hose using the appropriate socket, screwdriver or pliers. If not, trace and repair the circuit. Year Make Model Description 1999-2002 Mercury Villager Mercury Villager Engine Knock Sensor V6 3. Must be that the cold weather is turning on a lot of check engine lights. My mechanic said this would be the spark plugs buy maybe the wires so I paid to have them replaced a second time.
If the vehicle speed sensor fails, the cruise control system will not get a speed signal. If the drain pan is dirty or the antifreeze mixture is several years old, use new antifreeze when you refill the radiator. Sometimes it will take 15 minutes or take a few hours it depends on your luckâ¦ This question is asked nearly every day, in one way or another, in this forum. This requires checking for voltage fluctuations with a voltmeter hooked up to the knock sensor sub-harness electrical connector. If you go to Auto Zone, they have the sensor and can give you the step by step instructions to replacing the knock sensor with common tools.
Disconnect the speed control actuator on the throttle lever, then disconnect the accelerator cable from the throttle lever. By monitoring your car's timing, the Mercury Knock Sensor makes for efficient performance for all circumstances. The connector turns out fits alot of items on the vehicle so I am uploading a picture how the connector looks after you get it and snap off the plastic shroud. Loosen the locknut on the accelerator cable, then pull the cable out of its bracket on the top of the upper intake manifold. Separate the two manifolds, then clean the gasket mating surface of all gasket material. He calls me today and says the computer says the knock sensor is bad. From what my mechanic tells me and Auto Zone there are only 2 sensors, one in front of the catalytic converter and on … e behind it.
You cut the white wire 4 down in the harness --which leads to the internal sensor taking it out of the system and attach the wire to the new one. . I just changed mine and it is located on the top right side of the tranny. Reinstall the lower intake manifold washers, then install the bolts and nuts. Mercury Villager Knock Sensors operate with a computer chip to check ignition timing at all times in order to prevent engine pinging, which might cause problems.
Unbolt the four fuel injection rail bolts. It should give a reading between 400 and 450 millivolts. It requires considerable disassembly to get to. They said there was no issue with the head, that my seal was bad on my hood and that is where the water was probably coming from which made no sense to me because I park my van in a garage - it never sits in the rain. I can replace the knock sensor but it just doesn't make sense that a sensor would cause skipping or hesitation. Engine Mechanical problem 6 cyl Front Wheel Drive Automatic 150000 miles I am very discourages and frustrated however I really need answers. Connect the negative battery cable.
Disconnect the left breather hose from the left valve cover. You will have to remove the upper and lower intake manifolds and coolant crossover pipe assembly to reach it. Check for proper voltage from the sensor by back probing the connector with a straight pin. Remove the cap and set it aside leave the spark plug wires attached to the cap. Just because you are receiving a trouble code for it does not mean there is anything wrong with it.