Verify that fuel pressure is at the recommended level for the engine. A fuel pressure gauge can be used to check this. If the fuel pressure is too low, the engine will not be able to get the fuel it needs and will stall.
2. Check for vacuum leaks
Vacuum leaks can cause the engine to run lean and stall. Check all vacuum hoses and connections for leaks. If a leak is found, replace the hose or tighten the connection.
3. Check the oxygen sensor
The oxygen sensor is responsible for monitoring the amount of oxygen in the exhaust gas and adjusting the fuel mixture accordingly. A faulty oxygen sensor can cause the engine to run rich or lean and stall. Check the oxygen sensor for damage or contamination. If the sensor is damaged or contaminated, replace it.
4. Check the catalytic converter
A plugged catalytic converter can restrict exhaust flow and cause the engine to stall. Check the catalytic converter for damage or blockage. If the converter is damaged or blocked, replace it.
5. Check the computer
The computer controls many of the engine's functions, including fuel injection and ignition timing. A faulty computer can cause the engine to run poorly and stall. Check the computer for codes. If any codes are found, diagnose and repair the problem.
