Hey everyone, I've been doing a tune-up on my '91 Integra over the last week or so, come to find out the owner before me had never changed: the distributor cap, rotor, fuel filter, plug wires, and PCV valve. Needless to say, I've changed all of these, as well as transmission fluid and oil, but my question is: When I disconnect the jumper wire from under the dash after setting my timing, is it supposed to change the timing at all? With the wire jumped, I set the timing to exactly 16 degrees while at a perfect 750rpm idle. I tried disconnecting and reconnecting the jumper wire several times while carefully looking at the timing and it didn't change at all from the 16 degrees whether I had the wire jumped or not. If it doesn't matter whether or not the harness is jumped, then why does the manual say to do it?


Modified by 1991 DA at 12:40 AM 8/7/2006

 

i never understood why honda says to use that jumper wire when setting ignition timing.

everytime i jump it the timing stays the same.....

 

There are more rules to setting your timing, it must be fully warmed up, meaning the radiator fan has come on at least one time and shut off, you have to set the timing with all fans and accessories off. Jumping certain connectors is called BASE TIMING, taking the computer out of the picture. On a Toyota if the timing does not change then you disconnect the TPS but I have not heard of this problem on Hondas, you may have a problem but I cant help today, sorry, any more than I just did that is, more posting to do, you may be just fine.