Im sure this has been posted before, but my search fu is lacking. I have a 93 940d with a microsquirt and 2nd hand yoshifab harness. I keep seeing where ignition is set to 90* after tooth #1. I keep getting no starts and back fires. Im running all stock b230ft except for a ipd cam and waste spark thru 4 ls coil, using the crank vr sensor. What am i doing wrong???