* Vacuum leak
* Dirty throttle body
* Faulty fuel pressure regulator
* Clogged fuel filter
* Bad ignition coil
* Bad spark plug wires
* Bad spark plugs
* Bad oxygen sensor (even though you may not be getting a code for it, it could still be faulty)
* Bad catalytic converter
Troubleshooting Steps:
1. Check for vacuum leaks. Listen for hissing sounds around the engine while it is running. If you find any leaks, repair them.
2. Clean the throttle body. Remove the air intake hose and spray the throttle body with a throttle body cleaner. Wipe it clean with a rag.
3. Check the fuel pressure regulator. The fuel pressure regulator is located on the fuel rail. Disconnect the vacuum hose to the regulator and see if any fuel comes out. If any fuel comes out, replace the regulator.
4. Replace the fuel filter. The fuel filter is located under the vehicle, near the gas tank. Disconnect the fuel lines and remove the filter. Install a new filter in the reverse order.
5. Check the ignition coil. The ignition coil is located on the top of the engine. Remove the spark plug wires from the coil and check for cracks or damage. If you find any damage, replace the coil.
6. Replace the spark plug wires. The spark plug wires are located between the ignition coil and the spark plugs. Check for cracks or damage. If you find any damage, replace the wires.
7. Replace the spark plugs. The spark plugs are located at the top of the engine. Remove the spark plug wires and use a spark plug wrench to remove the spark plugs. Inspect the spark plugs for wear or damage. If necessary, replace the spark plugs.
8. Replace the oxygen sensor. The oxygen sensor is located in the exhaust manifold. Disconnect the electrical connector and remove the sensor using an oxygen sensor wrench. Install a new sensor in the reverse order.
9. If none of the above steps resolve the issue, the catalytic converter may be bad it may need to be replaced.
