Last post on Oct 23, 2006 at 2:23 AM
You are in the Nissan Quest
What is this discussion about?
Nissan Quest, Mercury Villager, Van
#493 of 2519 Nissan Knock Sensor
Nov 12, 2000 (5:01 pm)
I also have a 1996 Nissan Quest that was diagnosed as having a bad knock sensor.
The knock sensor itself was app. $230.00.
The majority of the remainder of the estimate was
for manifold gaskets that had to be replaced when they were taken off to reach the knock sensor and app. 5 hours labor to do the job.
There was also another $100. on the bill because they originally said that the problem was an Emission Control Valve and hose, so they started by replacing this first. (Seem more like parts changers instead of mechanics. )
This van only has 55,000 miles on it.
My question is, is this the life expectancy for a knock sensor. It seems to me that an electronic sensor that is in a position to have so much trouble to get to, should last a lot longer than 55,000 miles. Has anybody else had similar experiences with this problem?
#494 of 2519 Hi,Spirit5
Nov 14, 2000 (5:37 am)
I think in your case, they tried to go with the least expensive part first. Sometimes other components can cause problems with the knock sensor.. Since, they were unable to completely fix the vehicle by replacing the Emissions component they had to replace the sensor. I know it's expensive to have the sensor replaced,but it's also a long tedious job for the technician.. *Engineers don't always put sensors in the most user friendly place to get to...
kristina/co host Our Turn
#495 of 2519 transmissions
Nov 15, 2000 (6:42 am)
I just recently had to replace the tranny in my 97 Quest after 100k mi. Man, I am so disappointed with this van! Only 100k and the tranny goes out. The list of complaints I have is endless. Rear door locks, to rear shocks to weather stripping...
What the hell happened to Nissan. My family has had Maximas, Trucks, & B-210's and nothing has compared to this piece of crap. I was lucky and had the tranny put in wholesale and only paid $1400 for the tranny but I will NEVER BUY NISSAN AGAIN!!! I would sure love to hear from a Nissan rep and let them know how I feel!!!
Nov 15, 2000 (6:57 pm)
while I sympathize with your ordeal, I believe Nissan is not alone in drivetrain problems. From reading these boards, 100k miles on a transmission is not too bad!! Perhaps we are expecting too much out of systems that may not be up to the task of pulling around 2+ tons on a regular basis. Most powertrains in minivans are adapted from existing car platforms, and perhaps they are not up to the task of pulling so much extra weight.
To some extent, I think this is simply the "nature of the beast".
#497 of 2519 knock sensor in exhaust?
Nov 16, 2000 (3:46 pm)
Have you been sniffing too much exhaust, jkrolak? LOL
Knock sensors, as far as I'm aware, actually "listen" for the telltale sounds of detonation, then work with the engine control computer to retard the timing, thereby cutting power slightly, but eliminating the knock.
They don't need to be located in the exhaust, but they do need to be near the cylinder heads.
#498 of 2519 agt cooper
Nov 16, 2000 (5:18 pm)
Aren't they usually mounted directly to the engine block near the cylinder heads? That was always my understanding, but I have never actually checked.
Anyone out there have a Quest shop manual?
Nov 20, 2000 (12:18 am)
Thanks for looking that up.
Piezoelectric, huh? That's what I thought, yeah...
Nov 20, 2000 (5:47 pm)
Yeah, the hockey Badgers aren't doing so well this year. They are bound to have some off years, it's the nature of college sports.
I was out in the woods on opening day. My parents own some "hunting land" not too far north of here. Off topic, but my freezer will be well-stocked this winter.
BTW, I might be in need of your help with the shop manual come spring. Our A/C has been "infected" and smells horrible. I'm hoping we have a cold winter and it kills off all the nasties, but if it doesn't I will have to take some drastic measures.
I've tried Ozium and Lysol sprayed into the air intake. Both worked for about two weeks, and then the smell returned. I've done some research and there is a product I may have to try. It's a disinfectant foam that gets injected into the A/C system that fills the whole system. You have to drill a hole into the air box under the dash where the A/C box is (I forget the technical name for it) and spray the stuff in until it comes out the dash vents. Then you let it sit until the foam is gone. It supposedly disinfects the whole system. But I am leery of drilliing a hole in my A/C system without looking at the service manual.