I have a 94 civic hatch with a gsr swap with a skunk intake manifold. right now it is throwing a check engine light for knock sensor. car runs fine, but once i hook up the knock sensor car lags at 2300 rpm. why is this? could i have a bad knock sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by o_no_vtec &raquo;</TD></TR><TR><TD CLASS="quote"> car runs fine, but once i hook up the knock sensor car lags at 2300 rpm. </TD></TR></TABLE>

once you hook it up? why is it disconnected right now, or you've replaced it and when you hook up the new one it still lags? which one?

also, did you reset the ecu when you worked on it?

 

right now it's disconnected. it runs better this way. yes i did reset the ecu.

 

You using 93 octane gas? GSR runs a higher compression ratio.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by o_no_vtec &raquo;</TD></TR><TR><TD CLASS="quote">right now it's disconnected. it runs better this way. yes i did reset the ecu.</TD></TR></TABLE>

humm...then yes i would say you have a bad knock sensor. replace it.

 

there is still half tank of 87 in the car right now. i will put in 93 once that is empty. i was assuming that this could be the problem also. how can i test the knock sensor?

 

Borrow a friends. and swap it out.

 

i will try that