* Distributor Installation: Even a small misalignment of the distributor can prevent starting. The rotor must point to the correct cylinder at TDC on the #1 cylinder compression stroke. A slight off-set will result in the spark firing at the wrong time, causing a no-start condition. Double-check:
* TDC Confirmation: Absolutely verify #1 piston is at TDC on the compression stroke. Use a compression gauge to ensure you're truly at the top of the stroke and not just near it. A slight error here can make a huge difference.
* Distributor Shaft Engagement: Make sure the distributor shaft is fully seated and engaging properly with the oil pump drive. A slightly loose fit can cause misalignment.
* Rotor Alignment: With the distributor installed, carefully rotate the engine by hand. Observe the rotor's movement and ensure it lines up perfectly with the #1 spark plug wire terminal at TDC on the compression stroke of #1. If it's even slightly off, you'll need to readjust.
* Ignition System Issues: The distributor replacement might have exposed other problems:
* Ignition Coil: Check the ignition coil for proper function. A faulty coil won't produce the spark needed to ignite the fuel-air mixture.
* Spark Plug Wires: Inspect all spark plug wires for damage, cracks, or loose connections. Even a small gap can interrupt the spark. Make sure they're correctly routed and attached to the correct spark plug and distributor cap terminals in the proper firing order.
* Spark Plugs: Replace the spark plugs. Old plugs can cause a misfire, especially after such a major repair.
* Crank Position Sensor (CKP): This sensor tells the computer where the engine is in its cycle. A bad CKP will prevent the engine from starting.
* Other Potential Problems:
* Fuel System: Ensure you have fuel pressure. Check the fuel pump and fuel lines.
* Engine Cranking Speed: If the engine is cranking slowly, the battery or starter might be weak.
* Timing Chain/Belt: While unlikely to be directly related to the lifter replacement, a stretched or damaged timing chain/belt (if equipped) can cause the engine to be severely out of time, preventing starting.
Troubleshooting Steps:
1. Re-verify TDC: This is the most critical step. Use a compression gauge to be absolutely certain.
2. Check Spark: Remove a spark plug wire, attach it to a spark plug, and ground the plug to the engine block. Crank the engine and observe if you get a strong, consistent spark.
3. Inspect Ignition Components: Visually inspect the coil, wires, and plugs.
4. Check Fuel Pressure: If you have a fuel pressure gauge, test the fuel pressure. Consult your vehicle's repair manual for the proper specification.
5. Check Cranking Speed: If it's sluggish, check the battery and starter.
If you've checked all of these and still have no start, you might need to consult a qualified mechanic. The distributor is a critical component, and even a small error in its installation can lead to significant problems. Remember to always refer to a repair manual specific to your 1997 Chevy 350 for detailed procedures and specifications.
