1. Defective Fuel Relay(s): Check and test to troubleshoot a defective fuel relay in Toyota 4Runners
2. Blown or Damaged Fuses and/or Fuse box.
3. Low Fuel Pressure.
4. Fuel Pump is Defective
5. Camshaft/Crankshaft Sensor(s) are Defective in the distributor.
6. Defective ECM (Engine Control Module)