Hello guys... I have a 99 Mercury Villager, and I read hundreds of posts about the knock sensor codes, but still could not get an answer to my question. Basically, my check engine light is on and I am getting error codes for a bad knock sebsor. The van is fine when its started, but within minutes you can feel intermittent puffs of exhaust at the tail pipe. I verified that all the spark plugs and injectors are good. The Hayes manual says that you can check the knock sensor by finding the KS sub-harness next to the intake manifold, but the manual only shows diagrams of the KS harness for models up to 1998. When I looked next to the manifold, there is a rectangular harness with several (about 40) wires going in one side and out the other. I am not sure if I am supposed to test the KS using the white white wire in that harness. Also, would I pierce the back end of the harness with a multipeter probe, or undo the harness, and connect to one of the ends?
Do you think it's worth spending the $500 to have it replaced?
Thanks a ton!!