chibitul wrote:
> I followed the instructions step-by-step to check the ignition timing
> in my 1997 Civic LX. It was maybe 1/2 degree out of spec, I set it
> where it should be.
>
> Now, I want to know why you should jumper that service check connector
> when you do this? what happens if you don't jumper this connector?
>
> BTW: I could not locate the other connector (the 3-pin connector for
> data). I found where it should go in that rubber thing, but I cannot
> find the connector and the wires. Maybe 97 doesn't have one?
>
> next thing I want to check is the PCV, but I cannot identify the valve,
> even though I have some "diagrams" I am probably looking at it, but I
> cannot "see" it
>
if you leave it unconnected when you run the timing light, you'll see
the timing mark jump about as the ecu varies timing. with the service
connector shorted, it holds the timing steady so you can set it right.

just keep checking for the pcv. it /will/ be there.