Mechanics

CAR STALLS WHEN WARMED UP AND HOT AND HUMID

1999 Mazda 626 • 100,000 miles

27 mi trip to work. Runs great in morning. In afternoon when hot and humid, and engine is hot engine hesitates and cuts out very much like a vapor lock.
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Rkilbourne
September 3, 2011.



http://www.2carpros.com/articles/engine-hesitates

Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.

Rasmataz
Sep 3, 2011.