The "Test Only" smog station failed my 90 Accord and said that my timing was at 11 BTDC (should be set at 15 BTDC).

So I found info on how to set the timing on 4th Gen Accords and went and bought a timing light.

Every thing worked well except for one thing. I installed a jumper cable on the service connector located under the passenger front dashboard as per the instructions that I downloaded and set the timing to 15 BTDC.

I then removed the jumper cable from the service connector and rechecked the timing. Upon removal of the jumper, the timing went back to 11 BTDC.

The instructions that I have says that I need the jumper their to perform the timing adjustment, but it did not work.

So I reset the timing with out the jumper and everything was fine.

I took my car back to the smog test station and they checked it again and said it was good (checked at 16 BTDC).

Is it wrong to use a jumper to set timing on 4th Gen Accords? Did I get bad info?

The service connector that I used was blue and it had 2 pins down inside of it.
Did I use the correct service connector?

TIA

Car passed smog test by the way.