The only weak link left is fuel. Check your fuel shut off circuits - also check for an air leak in your fuel delivery as it could cause fuel drain back and the pump will have to try to build up fuel pressure again.
Hi! I did notice, after installing a semi-transparent hose that leads to the fuel filter, that the fuel did form bubbles and appeared to be moving back to the tank as soon as I turn off the engine. Is this not normal? How do I check the "fuel shut off circuits"? How do I check for an air leak? Thank you very much!