How to troubleshoot starting issues on a 1970 Plymouth Hemi 'Cuda?

If you're experiencing starting issues with your 1970 Plymouth Hemi 'Cuda, it can be a frustrating situation. Typically, starting problems may manifest as the engine not turning over, turning over very slowly, or starting and then immediately stalling. These symptoms can be caused by a variety of issues ranging from electrical problems to fuel system failures. Here is how to solve this issue with a step-by-step troubleshooting guide.

Step 1: Check the Battery and Connections

The first thing to inspect is the condition of your battery and connections.

• Locate the Battery: The battery is situated in the engine bay on the passenger side. It is a rectangular box with two cables attached, one red (positive) and one black (negative).
• Visual Inspection: Check for any obvious signs of corrosion on the battery terminals. Corroded terminals can prevent proper electrical flow.
• Clean Terminals: If you see corrosion, clean the terminals using a wire brush. To do this, first disconnect the negative cable, followed by the positive cable. Clean both the terminal posts and the battery cable clamps.
• Check Voltage: Use a multimeter to check the battery voltage. A fully charged battery should read around 12.6 volts. If the voltage is significantly lower, consider charging the battery or replacing it.

Step 2: Inspect the Starter Motor and Solenoid

Problems with the starter motor or solenoid could also be preventing your 'Cuda from starting.

• Locate the Starter Motor: The starter motor is usually mounted on the lower part of the engine block. It's a cylindrical component attached to the engine with bolts and wires running to it.
• Check Wiring: Inspect the wiring to ensure it is properly connected and there are no visible frays or damage.
• Test Solenoid: Listen for a clicking sound when you turn the ignition key to the "Start" position. If you hear a click but the engine doesn't turn, the solenoid may be faulty.

Step 3: Evaluate the Ignition System

The ignition system is crucial for starting your engine. Key components to check include the ignition coil, spark plugs, and distributor.

• Ignition Coil: This is typically located near the distributor and looks like a small cylindrical can with wires coming out of both ends. Ensure the coil is properly connected.
• Spark Plugs: Remove a spark plug using a spark plug socket and inspect its condition. Spark plugs should be free of oil or carbon deposits.
• Distributor Cap: Located at one end of the engine, the distributor cap is a round plastic component with several wires plugged into it. Remove the cap and inspect for any signs of wear or moisture.

Step 4: Examine the Fuel System

A faulty fuel system can prevent the engine from starting.

• Fuel Pump: Locate the fuel pump. In a 1970 Plymouth Hemi 'Cuda, it’s typically a mechanical pump located on the side of the engine. Ensure it's functioning by disconnecting the fuel line and checking for fuel flow while someone cranks the engine.
• Carburetor: Verify that the carburetor is getting fuel by looking at the float bowls. It’s a metal component mounted on top of the engine connected to the air filter housing.
• Fuel Filter: Ensure the fuel filter is not clogged. The filter is a small canister located along the fuel line, usually near the gas tank or engine bay.

Step 5: Verify Engine Grounding

A poor engine ground can disrupt the electrical flow necessary to start the engine.

• Locate Ground Strap: The ground strap is a thick braided wire connecting the engine block to the chassis. It's typically found on the lower part of the engine.
• Inspect and Clean: Ensure the connections are clean and free of corrosion. Use sandpaper to clean the contact points.

By following these steps, you can systematically identify and resolve the starting issues on your 1970 Plymouth Hemi 'Cuda. If after trying all these steps, the problem persists, it may be a good idea to consult a professional mechanic for further diagnosis.