alright i thnik i got a bad knock sensor but i dont wanna check for the code on my ecu i read the stickies on how to tell if u have a bad knock sensor and they are pretty much the same problems i am having. well question one should i just change out the knock sensor or should i be sure and just check out the computer? also is there anyone on the org in miami florida? thanks

 

Don't assume ... read the codes it's not that hard and can save you $$. Even if you're certain .. be that much more ... Little thing called confidence.
No brainer
Check the regional forums.

 

tap the knock sensor...if it changes ur idle...theres something...or is it the other way around...i read this somewhere but i cant remember where...

 

I wouldn't suggest tapping the knock sensor, it is fragile. Just check the codes, 5 minutes worth of work.

 

I agree, I wouldn't recommend tapping the sensor also, its very fragile.

 

I have a dumb question ... how do you know your knock sensor is bad if your car won't throw a CEL and you don't have a OBDII scanner. I don't feel like paying some tire place $60 to check my ECU just to learn that nothing was wrong.

 

Find a Autozone, they do it for Free.

 

Stickies above will tell you how to use the self-diagnosis mode on the ECU. The code is 0304 in that mode. The knock sensor doesn't throw a CEL light because the knock sensor doesn't serve as an emissions function.

 

How much affect does the KS have on gas mileage? I've been having KS codes for a while now and I cant seem to figure out if it really has a huge affect on it. I have a 97 SE and getting about 18mpg city, is that normal?

 

No that't not normal. Yes, you get bad gas mileage and poor performance.

 

Thanks for the quick reply, you think its worth buying on my own and then having someone install, or just have nissan do it?

 

na you should do it makes you learn about your car more, all you need is small hands, btw wear gloves

 

It's an easy install read the stickys ... You'll bang up your hand but it'll save you around 200 dollars and that's not including the part.

 

Thanks guys, I'll do it this weekend!!!

 

quick question got a 98 gxe61,000 miles do i have to change out my knock sensor i have the code reader but nuthing comes up says no codes and wheres a good place to get it from and any have apic of where exactly its located and maybe the write up for it to

 

umm ... read the stickys