I am very discourages and frustrated however I really need answers. Here goes
About 6 months ago I began having problems with my car skipping. I took it in to get the spark plugs and spark plug wires changed. After this, the skipping stopped for about 2 weeks then started again. My mechanic said this would be the spark plugs buy maybe the wires so I paid to have them replaced a second time. This helped for about 2 more weeks. The van starts skipping again, this time the check engine lights comes on and is flashing on and off. It does do it all the time only when the car is skipping/hesitating (btw the van is not skipping/hesitating all the time - only on occasion - maybe once every 2 to 3 days). I take the car in once again after the skipping causes the van to stall out. This time the mechanic calls me back and says the computer is reading bad knock sensor and that spark 5 is misfiring. He tells me that it is going to cost me close to $700.00 to replace the knock sensor HOWEVER this will not guarantee that the skipping/hesitations will stop. He explained that he was not sure how a "sensor" would cause the car's engine to skip.
So I take the van to another mechanic in hopes for a second opinion. He tells me the same thing.I can replace the knock sensor but it just doesn't make sense that a sensor would cause skipping or hesitation.
Frustrated and hopeless, I now take the van to a Ford dealership. They have my van for 2 weeks, they keep calling me telling me they cannot find out what is going on with the van. They hook it up to the computer and they said that spark 5 is misfiring and the knock sensor is bad, however let us keep looking because this just does not make sense. They told me that Nissan is actually the company that made the Mercury Villager so they would need to research some more. They call me back and tell me that one of my spark plug wires has water in it and this is what is causing the misfire and the reason it took so long to find this is because the sparks are numbered backwards on the villager. I immediately asked them where is the water coming from cause I was concerned that I had a cracked head. 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 pick the van up and it is running great! No skipping or hesitation and the check engine light is not on. 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. It does this for about 2 miles and then completely stops. No lights are coming on or anything. Later that night, I get in the car, drive about 2 miles and the jerking starts again. So bad to the point of make lots of noises because it is shaking everything and everyone in the car. Again, no dash lights are flashing on or anything. I am scared at this point to drive the van so I pay to have it towed to a different mechanic. He calls me today and says the computer says the knock sensor is bad.I am so frustrated I do not know what to do.I tell him my whole story of what the other mechanics have said in the past about this not being a knock sensor problem and he says different. He says that it can cause the van to jerk. Can you please help me?
have the same problem?
Friday, March 12th, 2010 AT 1:04 PM