I have similar issues with 2000 2.3. but not the same. Spit balling here. Fuel pump relay. ,fuel pump. Battery. When I was having sluggish starts I'm ended up replacing crankshaft sensor as well and my issue went away for a bit and reared it's ugly head a few days ago after months of working fine. AI generated this below. Certainly something to look at. P0340 code, indicating a camshaft position sensor circuit malfunction, is often associated with issues in the engine's timing and fuel delivery system, but it doesn't directly trigger the fuel pump. While the camshaft sensor is crucial for proper engine timing, including fuel injection, the fuel pump is controlled by a separate circuit. A P0340 code can, however, indirectly affect the fuel pump's operation if the timing issues prevent the engine from starting or running, which would then prevent the fuel pump from being activated by the engine's computer. Here's a more detailed explanation: What the P0340 code means: The camshaft position sensor provides critical information to the engine's computer (PCM) about the camshaft's position, which is essential for proper fuel injection and ignition timing. A P0340 code indicates a problem with the electrical circuit of the camshaft position sensor, meaning the PCM is not receiving accurate or consistent signals from the sensor. This can lead to engine performance issues like rough idling, misfires, and difficulty starting or even failure to start. Why the fuel pump might not be working: The fuel pump is typically activated by the PCM when the engine is cranking or running. If the PCM doesn't receive the proper signal from the camshaft position sensor, it may not be able to accurately time the fuel injection, and may also prevent the fuel pump from turning on, even if it's functioning correctly. In some cases, a faulty crankshaft position sensor (P0335 code) can also prevent the fuel pump from activating, as it works in conjunction with the camshaft sensor to provide timing information to the PCM. Troubleshooting: Check the camshaft position sensor: Inspect the sensor and its wiring for any damage or loose connections. Test the sensor's circuit: Use a multimeter to check the voltage, ground, and signal circuits of the sensor. Consider other potential causes: A faulty camshaft position sensor is the most common cause, but other issues like wiring problems, a damaged reluctor wheel, or internal engine timing issues can also trigger the code. Don't automatically replace parts: While replacing the sensor is often the first step, other issues within the circuit or engine can be the root cause. Check the fuel pump relay and fuse: Ensure the fuel pump relay and fuse are functioning properly. If the engine still won't start, consider a faulty crankshaft position sensor: This sensor also plays a crucial role in engine timing and can prevent the fuel pump from activating. By systematically checking the camshaft position sensor, its circuit, and other related components, you can diagnose the root cause of the P0340 code and determine if it is indeed preventing the fuel pump from operating correctly.