Possible Causes:
* Wiring Issue: Even with new parts, a wiring problem could be preventing power from reaching the coil or fuel pump. Check for:
* Fuses: Look for blown fuses related to the ignition system and fuel pump.
* Relays: Inspect the fuel pump relay and ignition relay, and check for continuity.
* Loose or Damaged Wires: Carefully examine all wiring connected to the coil, fuel pump, and associated components for any breaks, chafing, or loose connections.
* Grounds: Ensure the engine and chassis grounds are clean and properly connected.
* ECM Problem: The Engine Control Module (ECM) may be faulty, preventing it from sending the necessary signals to the coil and fuel pump.
* Distributor Issues: (If applicable) A problem with the distributor could be preventing spark from reaching the spark plugs.
* Ignition Switch: A faulty ignition switch could be interrupting power to the ignition system.
Troubleshooting Steps:
1. Check for Power at the Coil and Pump:
* Use a test light or multimeter to see if you're getting power to the coil and fuel pump when the ignition is in the "on" position.
* If no power, work backward from the component towards the fuse box, checking for continuity.
2. Inspect the Wiring Harnesses:
* Carefully examine the wiring harnesses leading to the coil, fuel pump, and ECM for any damage.
3. Test the ECM:
* This can be tricky without specialized equipment. Consider taking it to a mechanic for testing.
4. Inspect the Distributor:
* If your van has a distributor, check for any signs of wear or damage.
5. Check the Ignition Switch:
* With the ignition key turned to "on," test for voltage at the ignition switch using a multimeter.
Need Help?
* Mechanic: If you're not comfortable working on the electrical system, it's best to take your van to a qualified mechanic for diagnosis and repair.
* Auto Parts Store: Many auto parts stores offer free diagnostic services.
Important Note:
* Safety First: Always disconnect the battery before working on the electrical system of a vehicle.
* Refer to a Repair Manual: Having a repair manual for your 1996 GMC Safari will be extremely helpful.
Let me know if you have any further questions or need clarification on any of the steps. Good luck with your repairs!
