Potential causes for a hard starting issue immediately after sitting for 10 minutes on a 2000 Chevrolet pickup with a 5.7L engine:
- Fuel pressure issues:
- Check fuel pressure; it may be dropping quickly because of a faulty check valve, fuel pump, or fuel pressure regulator.
- Check for fuel leaks that may bleed the pressure.
- Faulty temperature sending unit:
- A sensor fault may provide incorrect engine temperature information to the computer, causing improper fuel mixture and hard starting.
- Issues with the ignition system:
- Problems with the ignition coil, spark plugs, or wires could lead to reduced spark strength, causing difficulty in starting.
- Incorrect air/fuel mixture:
- The mass airflow sensor or oxygen sensor may be faulty, leading to incorrect fuel metering.
- Computer errors:
- An issue within the engine control module (ECM) could result in the engine not receiving proper signals for smooth starting.
It is important to note that these are potential causes and the root cause may vary in each specific case. If the issue persists, it's recommended to seek a proper diagnosis and repair by a qualified mechanic or technician familiar with your vehicle's make and model.
