I have a y8 engine that has (had) a knock sensor. The problem is that I smashed it off during the JRSC install. It's not a problem now because I'm running a P28, but I still have to swap in my P2P to pass smog.

So my question is, how do I get rid of the CEL without having to buy a new sensor? Can I wire a resistor into the sensor harness or something?

I guess I just don't know how the ECU reads the trouble code. I assume it's just voltage dependent?

 

Can you talk nicely to it?? Maybe it will listen haha.

No, I have no idea...my first reaction was to use Hondata or something and disable the knock sensor....but then you said something about swapping the P2P to pass smog.

 

the ecu is looking for a 0-5v signal for the knock sensor. the more voltage the ecu see's(0-5v), the more knock the ecu think is coming from the engine. all you have to do is find the wire on your harness for the knock sensor and ground it out. by grounding out that wire the ecu is going to see 0volts and think there is not knock. dont forget to reset your ecu after you ground the wire out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2000civicsi &raquo;</TD></TR><TR><TD CLASS="quote">the ecu is looking for a 0-5v signal for the knock sensor. the more voltage the ecu see's(0-5v), the more knock the ecu think is coming from the engine. all you have to do is find the wire on your harness for the knock sensor and ground it out. by grounding out that wire the ecu is going to see 0volts and think there is not knock. dont forget to reset your ecu after you ground the wire out.</TD></TR></TABLE>

 

Unfortunately, that is not the case, nor will it work. The knock sensor does not "create" a 0-5v output, so grounding the wire from the ecu will do nothing for you besides illuminate the check engine light. Your best bet is to install a new knock sensor..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by locash &raquo;</TD></TR><TR><TD CLASS="quote">Unfortunately, that is not the case, nor will it work. The knock sensor does not "create" a 0-5v output, so grounding the wire from the ecu will do nothing for you besides illuminate the check engine light. Your best bet is to install a new knock sensor..</TD></TR></TABLE>
^^^.

 

Damn. Well there has to be some way to replicate the sensor. The old one has become "one" with the block and I don't know if I can remove it.

 

BUMP!

Smog papers arrived in mail and now this **** is down to the wire. I need to rid CEL!

A speaker is a simple load right? So all I need is the right resistor to replicate the load of the speaker? This doesn't seem like rocket science to me. Who here is good with electronics that can help me? How do I figure out which resistor to use? (seeing as I can't measure the impedance of the speaker because I broke it).

 

If you can get another one, maybe from a friend or somewhere.. to measrure th resistance and then replace it with the corresponding resistor.. just like the o2 heater simulator.