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Re: Stalls!
Here is what I have determined so far;
It looks like the Cyl. head temp sensor is the culprit, based on previous observations.
If the CHT sensor conveys an overheating condition to the PCM, the PCM would then initiate a fail-safe cooling strategy based on information from the CHT sensor. A cooling system failure such as low coolant or coolant loss could cause an overheating condition. As a result, damage to major engine components could occur. Using both the CHT sensor and fail-safe cooling strategy, the PCM prevents damage by allowing air cooling of the engine and limp home capability. For additional information.
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The CHT sensor:is mounted into the wall of the cylinder head and is not connected to any coolant passages.
It sends a signal to the power-train control module indicating the cylinder head temperature.
— If the temperature exceeds approximately 121ºC (250ºF), the power-train control module disables four fuel injectors at a time. The power-train control module will alternate which fuel injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine.
— If the temperature exceeds approximately 166ºC (330ºF), the power-train control module disables all of the fuel injectors until the engine temperature drops below approximately 154ºC (310ºF).
l If the engine reaches critical temperature, the following happens:
— The coolant temperature gauge pointer will read fully hot at approximately 121ºC (250ºF).
Bare in mind that I am NOT experiencing any overheating, however I believe the Cyl. head sensor to be defective. One is coming tomorrow.
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