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It cranks but immediately goes dead and if you push the gas…

Customer Question
It cranks but immediately...

It cranks but immediately goes dead and if you push the gas pedal it sounds like it's choking the engine and dies.

Mechanic's Assistant: Does the vehicle have a carburetor?

No furl injectors it's a 2011 cm Acadia

Mechanic's Assistant: Are you fixing your Acadia yourself? What have you tried so far?

Yes, replaced the throttle body and the knock sensors. At first I thought i had water in the gas

Submitted: 11 months ago.Category: GMC
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Answered in 2 hours by:
9/16/2017
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 11 months ago
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 16,247
Experience: have owned a repair shop for 25 years
Verified

Hi, My name is ***** ***** for the delay.
I will do my best to assist you.

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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 11 months ago

are you saying the engine will start and run a few seconds then the engine dies?

please explain

thanks

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Customer reply replied 11 months ago
makes a roaring sound then shuts off
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 11 months ago

does the security light stay on?

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Customer reply replied 11 months ago
No
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 11 months ago

please stand by. perhaps one of the other guys has a better idea of what is going on here.

someone will be right with you.

thanks

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GMC Mechanic: sprinkles08, ASE Certified Technician replied 11 months ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: GMC
Satisfied Customers: 24,206
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

Hello and welcome to JustAnswer!

There are many possible causes for the engine starting and dying. If it isn't a security issue it could be an exhaust restriction, lack of fuel pressure, fuel quality, it could be an internal issue or possibly an inaccurate sensor.

The first step in diagnosing the problem is to see if any fault codes have set. Have you checked for codes?

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Customer reply replied 11 months ago
Code p0443, we replaced the throttle body and the purge valve and knock sensor. Still does the same thing. Could it be the crank or cam sensor?
GMC Mechanic: sprinkles08, ASE Certified Technician replied 11 months ago

Are you losing spark?

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Customer reply replied 11 months ago
Replaced all the spark plugs
GMC Mechanic: sprinkles08, ASE Certified Technician replied 11 months ago

Ok.

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Customer reply replied 11 months ago
It also gives code p336
GMC Mechanic: sprinkles08, ASE Certified Technician replied 11 months ago

P0336 is for an intermittent signal from the crank sensor. You most likely have a bad crank sensor causing intermittent spark.

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