1. Ignition System: The lack of spark is the most critical issue. Here's a breakdown:
* Distributor Cap and Rotor: These are common wear items. Cracks, corrosion, or worn contacts can prevent spark. Inspect for damage.
* Ignition Coil: This component boosts the voltage to create the spark. A faulty coil will result in no spark or a weak spark. Testing is necessary.
* Ignition Control Module (ICM): This module controls the ignition timing and spark delivery. A bad ICM is a frequent culprit in GM vehicles of this era. It's often located near the distributor.
* Crank Position Sensor (CKP): This sensor tells the ICM the position of the crankshaft, crucial for timing the spark. A faulty CKP will prevent spark.
* Ignition Switch: A bad ignition switch won't send power to the rest of the ignition system.
* Wiring: Check all wiring related to the ignition system for breaks, shorts, or corrosion. This includes the wires going to the coil, distributor, and the sensor.
2. Fuel System: The lack of fuel is a separate, but equally important problem.
* Fuel Pump: A failed fuel pump won't deliver fuel to the engine. You can listen for the pump's whirring sound when the key is turned to the "on" position (but not cranking). If you don't hear it, it could be faulty, or there might be a problem with the fuel pump relay or fuse.
* Fuel Pump Relay: This relay controls the power to the fuel pump. A bad relay will prevent the pump from operating.
* Fuel Filter: A clogged fuel filter restricts fuel flow.
* Fuel Injector(s): While less likely to cause a complete lack of fuel, faulty injectors could be part of the problem.
* Wiring: Check wiring to the fuel pump and related components for damage.
3. Interconnected Issues:
It's crucial to understand that these systems are often interconnected. For example, a faulty PCM (Powertrain Control Module) could affect both the ignition and fuel systems. A PCM fault could lead to no signal to the fuel pump relay or ignition control module.
Troubleshooting Steps:
1. Start with the basics: Check fuses and relays related to the fuel pump and ignition system.
2. Listen for the fuel pump: Turn the key to the "on" position (without cranking) and listen for the pump to run for a few seconds.
3. Visual Inspection: Carefully inspect the distributor cap, rotor, ignition coil, and wiring harnesses for any obvious signs of damage.
4. Testing: You'll likely need a multimeter to test the ignition coil, fuel pump, and other components. A scan tool can help diagnose PCM or other sensor issues.
5. Professional Help: If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic. Improper diagnosis and repair could lead to further damage.
Don't jump to conclusions about replacing parts. Systematic testing will help you pinpoint the exact cause of the problem and save you money. Start by checking the simplest things first (fuses, relays, visual inspection) before moving to more complex diagnostics.
