My 92 Pathfinder SE runs intermittently. Fuel injector pulse cuts out when I hit a bump or go around a turn. Any help in troubleshooting this would be appreciated. I have already checked the ignition switch and relays. Sometimes, it won't start even though I can feel the vibration in the fuel line coming from the fuel pump. It is definitely geting a spark. When it won't start, I can spray starting fluid in and it kicks over for a couple seconds. Please help, this issue has got me completely baffled.