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Technicaldan
Technicaldan, UK Car Mechanic
Category: UK Car
Satisfied Customers: 104
Experience:  Accredited
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Engine cuts out when warm at the same temperature every

Customer Question

engine cuts out when warm at the same temperature every time
JA: How many miles are on the car? Have you checked the coolant level?
Customer: coolant level is fine mileage is 135.00 miles
JA: What is the model of your '00 Hyundai?
Customer: model is a santa fe 2.7 petrol 04 reg
JA: Are you fixing your Santa Fe yourself? What have you tried so far?
Customer: crankshaft sensor fitted no management light or fault code present
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 24 days ago.
Category: UK Car
Expert:  david craig replied 24 days ago.

Hi Im David, the only thing i can suggest is that you get a scan tool with capabilities of reading live data and freeze frame the data while driving when this condition occurs. that way we can tell what is happening with the engine sensors at shutdown.

Expert:  david craig replied 23 days ago.

checking in to see how its going

Expert:  Technicaldan replied 22 days ago.

Given that you have replaced the crank sensor, I would be looking to use diagnostic tool that can view the live data, leave the vehicle for a good 24 hours, then read the data and compare the readings from the various temperature sensors, they should all be around 1 or 2 degrees Celsius from each other when cold and resting.

If it is a heat related issue, I question if the engine coolant temperature sensor is faulty, hence the start up okay from cold but as the engine warms up it struggles, possibly due to the ecu believing the engine is still cold and running in similar to 'choke' mode to warm up.

If you have no diagnostics, I would try replacing the engine coolant temperature sensor as the diagnostic work on them usually outweighs the cost of replacement.

The camshaft sensor would be worth checking also if fitted as it is likely that this would control injection timing.

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