I have a love/hate relationship with this machine but more love then hate so i still work on it. I have a 2001 SRX that when i pull it under compression and is about to fire it locks up. So it pulls fine for 3/4 of the pull and then it just locks up. If i take the spark plugs out and pull it. It pulls fine and never locks up. However, i think that all the plugs are firing at the same time. this is causing the lock up. Is there a way to tell the firing pattern. Does anyone know the firing pattern. I have purchased three different CDI boxes and they all behave the same way. Trying to diagnose and any information would be helpful.