i was reading on nissanperformancemag.com about relocating the knock sensor on the sentra spec v, the knock sensor on the sentra is sensitive, just like the maximas, and i was wondering how it would affect us maxima owners by relocating the knock sensor...read about it here..maybe someone has already done this to the maxima

http://www.nissanperformancemag.com/.../knock_sensor/

 

http://www.cardomain.com/member_page...=391233&page=2

 

something im willing to try, thanks for the link.

 

So how do you know if your ks is actually working? There's a real reason why its located where it was plus being that it was place there by a Nissan engineer. If you are an engineer then you wouldn't have any problems explaining why you chose the location that you did aside from it being too sensitive when it was at the previous location you selected. Do you guys really believe everything you read on the magazines?

Do you know what will happen if the ks isn't detecting what its suppose to do and your engine keeps pinging w/o the ecu being aware of it because the ks isn't sending any signals to it to tell it to adjust the engine's timing?

 

Oh god not again. Don't do this, don't be stupid. If you relocate it how will it know if your engine is knocking so it can retard, you, timing and prevent detonation?

 

BOOOOOOOOOOOOOOOOOOM....................blown engine!

 

look as an aircraft mech i see stupid crap a/c engineer's do all the f' ing time. but i would say that this seems a good place to put a k/s but......i do not like the wire harness going to said item....just my .02 worth...if as they say to test the k/s in mega ohm ....just my question to the enginers why the small wire and why ck the engine gnd.... when testing? the fsm says to test the engine grd as well .....this means its a loop and thats what i dont like.....other than that ya all have a great day

fish

 

 

Yaaaaa, werd G

 

ok different way to look at it is this - goto pg 242 of the fsm in the EC chapter and you tell me what they are saying- its simple if you look at it simply- does the maxima have a ground problem,

let me give you an example
http://autos.msn.com/research/vip/Re...9&src=vip#Engi

now if this is grounded or has a problem with a ground - now you tell me bud

will it give a false sig?

 

is that english enough for you biotch

 

have a great day will ya. and dont ever flip off an old man again.....

 

Alright, old fart. I understand electronics, I just can't understand your ****ty grammar skills. The KS mostly fails cause of heat or cracks. The ground could be the problem but in most cases it's not. When mine failed in the old car, the ground was fine but the sencor was cracked.

 

I have the KS relocated to the firewall and its been that way for about a year or so. No pinging or knock to my knowledge. Not saying there hasn't bee, by any means, but you know what i mean. I made sure it was getting a reading by reseting the computer and the 0304 code was gone. Granted the motor could be sensing "knock" by road bumps and what not but at this point i don't care... as long as the car runs fine.

 

Resetting the computer doesn't ensure anything. Resetting the ECU doesn't make the problem go away. If anything, you just erased the codes that tripped the ECU. It doesn't ensure that the knock is truly and actually sending anything to the ECU. Think about this, if the KS isn't sensing any knocks and pings, no code right? Then how do you check if the KS is actually sensing something? There's no CEL but how do you know for sure??? ESP???

Ok so you don't care, so you probably don't care what happens to the engine in the long run. It's like saying that the car runs fine with 87 octane fuel but how will your engine run 3 or 4 years from now? If you still don't care about that then you .

 

If there was a problem, the ECU would detect it. It is working because when i first put it on the firewall it was bolted to a piece of plastic and the code still existed. When i moved it to full metal contact the code left ensuring that the ECU WAS getting a signal from the KS. The car has been running perfect for the last year. So... eat a dong buddy.

 

True but the ECU won't detect it if the KS is not sensing anything because of its new location thus sending the signal to adjust engine timing to the ECU. Its not whether the ECU detects it or not, it is whether the KS detects the knocks and pings effectively at its new location. Here's another logic, the KS is suppose to detect pings from the engine not the chassis. You and some people here moved the KS to the firewall, do you really thing it will truly give you a good reading being that its no longer located on the engine? Your KS is only sensing metal but it doens't know if its on the engine or not. What if there are vibrations traveling thru the chasis of your car would the KS know the difference from that versus a true knock or ping? Just because this idea was published on the magazine it doesn't mean it's effective.

And there's no reason for being an *** by using names because I never called you names.

 

So if the computer recognizes the KS... it should be doing its job and detecting knock if it occurs. Why would it do one part of the job (acknowledging the presence of the KS) and not do the other (sensing "knock"?)

 

Read the FAQ, it's there for a reason. But to give you a short answer. The KS can operate fully, partially, or not at all. If the ECU is only concerned about continuity, whether the KS is there or not, then those 3 modes of operation above is irrelevant. Therefore, there is more involved than just sensing the KS's existance. The KS still has to get a valid reading and being that its located on the firewall, do you really think the KS gets a true and valid reading? If the doctor puts a ste-thoscope on your a$$ to listen for heartbeat, do you really think he will geta true reading? The ste-thoscope is still on your body, only a few feet below the heart but how accurate will that reading be? Read the FAQ and you'll understand how it works. Then come back here and tell us if relocating the KS is really a good idea or not.

 

It detects knock from the engine block, how the **** can it sense the knock when it's on the firewall. How ****ing retarded are you people getting? Just backing you up DR.

 

Gotcha!!! It is freaggin' common sense. People would rather follow what's written on the magazine than logic. It doesn't make sense.

 

ummmm because its not located in a spot where it'll actually sense/detect pinging

By your logic, I can run a wire to my drivers seat and attach the KS there, but heck, the ECU will still detect the KS functioning, therefore, it'll hear pinging from the drivers seat

 

and it says that the specv ks is extremely sensitive to vibration, weather engine knocks OR intakes, retarding detonation so as to protect the damn engine, when it shouldnt. so relocating it merely makes it less likely to be tricked by unwanted or unimportant vibrations. i see this pointless for my car.

 

"pinging" is a sound. all sounds have certain frequencies. a knock sensor detects a certain frequency of sound that can only be from premature detonation or "knocking". unlike the sentra our knock sensors are not overly sensitive. they do not respond to other frequencies like intake or exhaust noise like owners of the sentra claim that effect their cars. by removing the knock sensor and relocating it you affect the ability it has to do its job. leave it in the stock location because that is the only place it will "hear" spark knock.

 

You say the ks is extremely sensitive to vibration, but by moving it to another location it won't be tricked by unwanted or unimportant vibrations. If you move it off the engine it will only detect unwanted or unimportant vibrations .

 

Preeeeeach on bruthas!!!!!!!!!

 

what is being done on the spec-v in the mag and what people are doing to maximas by bolting it to the chassis is totally different.

on the spec-v it is still connected to the stock location but it is done some by attaching the ks to an amp cable or similar sized current carriying cable. then that is attached using an o-ring to the hole in the block to the stock location. so the ks still would sense a vibration or knock from the motor but not every other minor shock caused by an exhaust, pulley or intake.

 

wow shot em down....

 

Shot what down? If they want to be idiots and believe whatever it is that the magazine rights about, its their perrogative. Whatever the end result is, well it's something they'll have to face in the long run. Besides, that article is about the KS mod on a Sentra because their KS is known to be overly sensitive. That is totally irrelevant to the Maxima KS because ours isn't like the Sentras. Still, in order for any sensor to be effective, it has to be located correctly. Would you put an air temp sensor right by the radiator cooling fan? It doesn't make sense. Putting the KS on the firewall sounds just as obsurd.

But hey, its their car, do as they wish. Then don't come crying in the forum and post about how the engine is blown because people are too dumb to understand common sense.

The point has already been made as too how dumb and pointless this mod is. There's no point in repeating it for anyone else.

 

ughh...okay. it's LESS LIKELY to detect the noises...whatever, read the article again, you. i'd smack you back but im too lazy. lol