I was using my 3510i about 2 hrs ago, and it suddenly quit, like I had turned the switch off. Now it will turn over, but won’t run. I replaced the fuel filter (it was time anyway), bled the air out, and it still won’t run. I also cracked two different injector lines to see if there was an air lock - still nothing. A very small amount of air came out of the first injector, nothing from the other, and no fuel either. The fuel pump is working. Will any of the safety switches still allow it to turn over but not crank? Or will the injector pump very suddenly stop pumping?