After swapping a sohc zc into a 89 civic si from a CRX, its running fine. its just after driving for 5-10 minutes the check engine light keeps coming on. Any help or suggestions. The knock sensor is in and the O2 sensor is connected too. Cant figure it out. Kinda afraid to run it hard untill I figure this out.

 

whats the code you are getting? Knock sensor and O2 sensor?? Did you count the blinks?

 

correct me if im wrong, the code i read on the ecu. there is like lil window rite? how do translate it?

 

you never know, the sensors might be bad. The same thing happened to me earlier this year. Be driving for a few miles and the check engine light would come on. I'm sure someone has the chart of codes in here somewhere!

 

Go look at the ecu after the CEL comes on. Count how many times the red light blinks and then search for what that code means

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_CRX &raquo;</TD></TR><TR><TD CLASS="quote">Go look at the ecu after the CEL comes on. Count how many times the red light blinks and then search for what that code means</TD></TR></TABLE>



Count like this:

Long blinks = count by 10
(3 long blinks would be 30)

Short blinks = count by 1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_CRX &raquo;</TD></TR><TR><TD CLASS="quote">Go look at the ecu after the CEL comes on. Count how many times the red light blinks and then search for what that code means</TD></TR></TABLE>

it's a red light in the ecu? mine's yellow

oh yea there is a chart of codes eather at http://www.PGMFI.org or use the wonderfull search

 

Update: Thanks everone. We looked up the code. I feel stupid. Vehicle speed sensor. I knew it wasnt working but I didnt think it would cause the check engine light. But anyways its fixed now.