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2005 Hyundai Santa fe 2.7 engine. Stalls when idling. Runs…

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2005 Hyundai Santa fe 2.7...
2005 Hyundai Santa fe 2.7 engine. Stalls when idling. Runs between 10 minutes and up to 50 minutes. Starts right backup again with no problem. When driving runs fine. Stop and it will more then likely stall. Replaced Idle air control valve and throttle position sensor twice. Cleaned throttle body.
Submitted: 8 months ago.Category: Hyundai
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Answered in 4 hours by:
10/4/2017
Hyundai Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Hyundai
Satisfied Customers: 23,971
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
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Hello and welcome to JustAnswer!

There are quite a few things that can cause the engine to die and it will require some testing to determine exactly what is going on. If it dies abruptly then you're most likely losing spark for whatever reason. A failing crank sensor would be one of the most common causes of lost spark.

The first step in diagnosing the problem is to use a scan tool or code reader to see if any fault codes have set. Have you checked for codes?

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Customer reply replied 8 months ago
I told you wrong. The throttle Position sensor was never replaced. It was the Crankshaft position sensor that was replaced twice.
We have a Snap-on scope and was monitoring the Crankshaft position sensor and the waveform seems solid. It did throw a Crankshaft position sensor code once and that is why it was replaced twice. Thought we might have gotten a bad part. Does this car have a Oil Control Valve? I found a TSB about it and could cause issues.
Hyundai Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago

You were watching the crank sensor on a labscope at the time it died?

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Customer reply replied 8 months ago
we were watching the waveform until it died. the engine cuts off abruptly. starts up right away, with very little cranking. would a crankshaft sensor only act up on idle.
Hyundai Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago

Is there any other information that was omitted from the first post?

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Customer reply replied 8 months ago
No, has us stumped.
Hyundai Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago
What is fuel pressure when it dies?
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Customer reply replied 8 months ago
Don't know. Will have to put a gauge on it and check.
Hyundai Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago

Ok.

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sprinkles08
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