"Breaking In" the Knock Sensor

Reply Subscribe

Thread Tools

Search this Thread

05-27-2003, 09:49 AM

D1NOnly34

Senior Member

Thread Starter

iTrader: (4)

Join Date: Apr 2002

Posts: 1,663

"Breaking In" the Knock Sensor

Well I changed my KS a few months ago, and now I get the ghost KS code again (03 04) and nothign else. There is another thread that says how people put a resitor on the KS to sort of bypass it so that the ECU would read that it is fine. I'm thinking about doing this, but then my friend told me that the ECU needs time to "break in" the KS, about 300 miles or so. And supposedly everytime you check for codes on the ECU, it starts teh process again. I have been checking codes recently to see if somethign pops up, and am thinking that if I reset my ECU completely and leave the car to run for about 300 miles, somethign will happen, if not I will try the resistor idea becaus emy engine is runnign horrible with horrible idling, loss of low end power, bad gas mileage..basically as if the timing was really messed up due to the KS i think. Well let me know what you guys think or any suggesstions. Thanks

Devon

05-27-2003, 10:52 AM

njmaxseltd

Member who somehow became The President of The SE-L Club

iTrader: (19)

Join Date: Jun 2001

Posts: 16,033

The reason your getting the KS code is because your engine has knock and / or ping that it's picking up.

The KS code is set when the KS produces a voltage that is outside the acceptable range. (Taken from the Nissan Factory Service Manual) That means it's picking up engine knock or ping that is greater then the norm.

05-27-2003, 11:02 AM

D1NOnly34

Senior Member

Thread Starter

iTrader: (4)

Join Date: Apr 2002

Posts: 1,663

Yup, thats what its suppose to do, but I have no idea what actually is causing this pinging/knocking....and I have no idea how to find out.

05-27-2003, 11:45 AM

sandman1098

Senior Member

Join Date: Mar 2003

Posts: 506

What grade of gasoline are you using? if you are running a low grade of gas in your car, switch to a higher grade (a minimum of 91 octane) and drive around for about 50 or 100 miles...... See if it gets any better or not

05-27-2003, 12:55 PM

D1NOnly34

Senior Member

Thread Starter

iTrader: (4)

Join Date: Apr 2002

Posts: 1,663

Only use 93 octane from Amoco.... supposedly the ECU need around 300 miles to fully start acting noraml again.

05-27-2003, 01:41 PM

sandman1098

Senior Member

Join Date: Mar 2003

Posts: 506

Is that for any emission related repair?

05-27-2003, 03:13 PM

D1NOnly34

Senior Member

Thread Starter

iTrader: (4)

Join Date: Apr 2002

Posts: 1,663

Beats me, I would think so...

05-28-2003, 05:24 PM

delacruz_17

Member

iTrader: (1)

Join Date: Mar 2003

Location: Houston

Posts: 262

resisor on KS? More info. i have the light on b/c of the KS and i can't pass inspection (Texas) i need to temp. turn that off till i get enough money to replace the KS..

05-28-2003, 07:34 PM

Little95Max

Supporting Maxima.org Member

Join Date: Feb 2003

Posts: 57

Maybe I miss understood you. Did you clear the ECU codes after you installed the new KS? I don't think the code clears by itself.

I changed my KS about two months ago. I pulled the negative battery cable for about 1 day, and after that my car runs like it is brand new (except for an oil leak). I check the ECU code every so often and I always get 0505.