When a vehicle has fuel pressure but no spark and injector pulse, the issue is typically related to the ignition system or the engine control module (ECM). Here are a few possible causes and steps you can take to troubleshoot the problem:
1. Ignition Coil:
- Check the ignition coil and make sure it's receiving power. If the coil is not receiving power, replace it.
2. Distributor Cap and Rotor:
- If your vehicle has a distributor cap and rotor, inspect them for cracks, damage, or corrosion. Replace any faulty components.
3. Spark Plugs and Wires:
- Check the spark plugs and spark plug wires to ensure they are in good condition. If the plugs are worn or the wires are damaged, replace them.
4. Ignition Control Module:
- The ignition control module (ICM) is responsible for controlling the ignition timing. Check the ICM and ensure it's receiving power. If the ICM is faulty, replace it.
5. Engine Control Module (ECM):
- The ECM controls various engine functions, including ignition timing and fuel injection. If the ECM is malfunctioning, it can prevent the spark plugs from firing and the injectors from opening. Have the ECM scanned for trouble codes to identify any issues.
Note: If you don't have the tools or expertise to perform these checks safely and accurately, it's best to seek assistance from a qualified mechanic.
