Last post on Nov 05, 2013 at 7:16 PM
You are in the Nissan Quest
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Mercury Villager, Auto Repair, Electrical, Engine, Fuel System, Van
#73 of 126 Re: 1999 Mercury Villager Knock Sensor [snorkelbobby]
Jul 07, 2009 (6:19 pm)
snorkelbobby can you help or anyone else? I just purchased a knock sensor at Checkers for my 2000 Mercury Villager. I started having problems yesterday when the traffic was backed up. Lots of stalling, the van dieing on me, lots of hiccups and etc. I immed drove it to Goodyear and they ran a diagnostic and told me it was the knock sensor and that the intake manifold needs to be resealed, and a new valve cover gasket?
I drove it again today and the van died six times and took a few attempts to start just driving a 1/4 mile. In between all of that I had a lot of close calls with it dieing. Like I said this all really began yesterday but for the past couple of weeks we would have a slight hestitation every now and then when driving.
#74 of 126 stalls after it warms up
Aug 27, 2009 (12:09 pm)
k so my van is the 95 villeger. it boggs out like it is running out of gas with a full tank all of this happens at normal running temp and some time i can get it to start back up while im moveing but more often than not it comepletely dies and when trying to start it will start then bog out shortly after it is giving me a big head ache i would like to take it to the salt flats to blow it ski high any suggetions?
#75 of 126 Re: 1999 Mercury Villager Knock Sensor [mlangali]
Oct 25, 2009 (6:23 pm)
Hey guys, I had the exact same issue with my '99 Villager. It would run fine at cold start up but as soon as it would warm up a bit, it would misfire, and chug at idle. It would smooth out somewhat under acceleration but the problem was always there. I tried a new cap, rotor, plugs, cleaned the optical sensor inside the distributor, new EGR valve, a couple of fuel injectors and it didn't help. At times, it would generate a check engine light (random miltiple misfire code) and when I would clear it, sometimes it wouldn't even generate a code for a while, however it would akways run rough. Anyway, it turned out to be the distributor! I pulled out the distributor and there were shavings all over the gear. I did some research and apparently they are known for failing. The heat tends to take a toll on the coil and knock sensor (which are both inside the distributor) and combined with the gear wear, it can cause a misfire code due to excess play. I put in a new distributor and the problem is finally gone and It runs good now! This problem plagued me for a couple of years and even a couple of dealerships couldn't find the problem. Buy one on eBay, because they are not cheap. It sounds like that is your problem as well.
#76 of 126 Re: 1999 Mercury Villager Knock Sensor [ddgiant]
Dec 30, 2009 (1:42 am)
I am looking for advice on how to replace the knock sensor on a 2001 Quest. I am hoping that someone can tell me how to replace it without removing the intake manifold.
#77 of 126 Re: 1999 Mercury Villager Knock Sensor [pcsbob]
Dec 30, 2009 (5:46 am)
Please look into this Further, normally you do not have to replace this part. This knock sensor is like a microphone...and is hard to get to and is on the block behind the intake maifold.. that detects detonation.
If you have detonation it is caused by something else. I had similar problems with my 95 villager and it ended up being my distributor assembly, and there was no code for that. I saw another post saying the knock sensor was part of the distributor assembly, On my van it is not... it is a seperate sensor.
I have read a bunch of these forums that say similar things. The knock sensor code is usually tripped by another problem. And by itself does not cuase you van to run bad.
#78 of 126 Re: 1999 Mercury Villager Knock Sensor [pcsbob]
Dec 30, 2009 (8:45 am)
You should not have to replace the knock sensor at all. 1 in a million go bad. Also there is no way to replace the sensor without removing the intake. It is mounted on the top side of the block under the lower intake manifold. Something is causing the knock sensor to trigger. When a code for the sensor is posted it is because the sensor was triggered, not because it was bad... There could be multiple areas that could cause this. Read through this topic and start to eliminate the possibilities.
#79 of 126 Re: 1999 Mercury Villager Knock Sensor [graham66]
Dec 30, 2009 (10:46 am)
Thanks for the reply on the knock sensor.
The van is actually running fine. I have not noticed any missing, surging or stalling. I have noticed that my gas mileage has dropped a bit. The only known issue is the P0325 code that I have when a scanner is connected. This code will keep me from passing the local emissions test.
Still think i should look beyond the actual sensor?
#80 of 126 Knock sensor + Oxygen sensor
Jan 04, 2010 (5:29 pm)
Has 99 villager, runs great! until lately. Check engine light on. and noticable lower MPG. Went to shop for checking: replaced Oxygen and Knock sensors based on codes.
Two weeks later, car runs rough at reverse gear and when you hit a brake.
#81 of 126 Re: Knock sensor + Oxygen sensor [tester1]
Jan 04, 2010 (8:01 pm)
Thats a tough one. When the car is in reverse do you have your foot on the brake? If so the underlying issue is when the brakes are applied you get the rough idle. If the answer to my beginning question I would pursue a vacuum leak. The power booster sucks alot of vacuum. I first would look at the vacuum hose from the booster to the intake manifold. If that appears OK I would get a can of carb cleaner. With the vehicle running, spray all vacuum hoses. Be sure to get the vacuum hoses on the back of the motor. What you want to look for is a surge in the idle. Pay attention to where and what you spray. If you hit a hose with the cleaner and it surges that vacuum line has a leak. Dont forget to spray around the intake as well. Hope that finds it for you....
#82 of 126 Re: Knock sensor + Oxygen sensor [ckent724]
Jan 05, 2010 (12:57 pm)
Thanks for the detail information ckent724!
Some update from me.
I opened up the air-filter compartment and used the air-cleaner-can try to blow clean the MAF sensor. Afterward, drove the car and feel (without brake) in reverse gear. Car was running rough. drive for ~6 miles and check-engine-light is on.
Plan to read the obdii code today.