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Crank no start, codes P0014 and P0366

Tiny
AH8007
  • MEMBER
  • 2006 CHEVROLET TRAILBLAZER
  • 4.2L
  • V6
  • 4WD
  • AUTOMATIC
  • 275,000 MILES
Driving down the road and the vehicle started to lose power. Eventually it cut off. Towed it home.
Sometimes when you try to start it it does start but immediately cuts off. But most of time it won't start at all.
Check for spark. Which I was getting but seemed weak and inconsistent
Sprayed starting fluid in intake still wouldn't start.
Replaced camshaft, crankshaft sensor and still would not start.
Has codes p0014 and p0366.
What code be issue?
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Sunday, March 1st, 2020 AT 12:25 PM

33 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I would start by checking the compression to see if you have a timing issue with the chain.

https://www.2carpros.com/articles/how-to-test-engine-compression

This sounds like a crank sensor as it is related to both codes and would explain the little or no spark issue.

Roy
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Sunday, March 1st, 2020 AT 3:04 PM
Tiny
AH8007
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  • 63 POSTS
I've checked compression. Got good readings. 160 each cylinders.
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Sunday, March 1st, 2020 AT 5:42 PM
Tiny
AH8007
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  • 63 POSTS
I replaced the crank sensor and it still wouldn't start after replacing.
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Sunday, March 1st, 2020 AT 5:43 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Does the tachometer go up a little while cranking?

Did you check the fuel pressure? Try spraying some carburetor cleaner in the air filter and see if it starts and stalls.

Roy
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Sunday, March 1st, 2020 AT 6:00 PM
Tiny
AH8007
  • MEMBER
  • 63 POSTS
Fuel pressure seems good. Read 60 psi when key is turned to on position. Dose drop do to about 50 psi after 10 minutes. When cranking the engine it bounces around 50 through 60 psi. Sprayed starting fluid in throttle doesn't do anything. Tachometer doesn't move while cranking. Getting codes p0135 and p0141 now.
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Monday, March 2nd, 2020 AT 5:42 AM
Tiny
AH8007
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  • 63 POSTS
Keep in mind. The truck does act like it wants to start. And when it does it shuts off immediately. Also the instrument gauges start going crazy and lights start flickering.
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Monday, March 2nd, 2020 AT 5:53 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Can you check for spark when it is cranking?

It could be a crank sensor.

The pressure should not bounce at all. It needs to be constant.

I would also check the compression. You need to be sure the chain timing is correct.

Roy
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Monday, March 2nd, 2020 AT 5:58 AM
Tiny
AH8007
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Compression reading was like 180 psi. There is spark when cranking. And I already changed the crank sensor.
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Monday, March 2nd, 2020 AT 6:41 AM
Tiny
ASEMASTER6371
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Okay, back to the fuel pump. It should never bounce around.

What was the pressure while cranking?

Roy
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Monday, March 2nd, 2020 AT 6:43 AM
Tiny
AH8007
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  • 63 POSTS
Uploaded a video. Makes things easier.
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Monday, March 2nd, 2020 AT 7:42 AM
Tiny
ASEMASTER6371
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Good, thank you.

I am concerned about the fuel pump. It should not bounce like that.

Can you see if there is actual fuel in the rail? I am concerned you may have pressure but no volume.

Roy
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Monday, March 2nd, 2020 AT 8:09 AM
Tiny
AH8007
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  • 63 POSTS
How do I check if fuel is in the rail?
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Monday, March 2nd, 2020 AT 8:30 AM
Tiny
ASEMASTER6371
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You would need to bleed down the system to 0. Then remove the core in the rail adapter for the gauge. It is the same as a tire valve. Then hook up a hose to the connection and run it to a bucket.

Then turn on the key and check the fuel flow out of the rail.

Roy
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Monday, March 2nd, 2020 AT 8:40 AM
Tiny
AH8007
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It seems to be fuel in the rail.
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Monday, March 2nd, 2020 AT 5:16 PM
Tiny
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Is there a good flow?
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Monday, March 2nd, 2020 AT 6:02 PM
Tiny
AH8007
  • MEMBER
  • 63 POSTS
I messed up on my diag. The vehicle isn't getting spark.
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Tuesday, March 3rd, 2020 AT 9:21 AM
Tiny
ASEMASTER6371
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Okay, when you crank it, does the tachometer move up a little? That will tell me if the crank sensor is working.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

I attached a wiring diagram as well. Check the coils at the red wire for power. It is controlled by the fuse listed.

Roy
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Tuesday, March 3rd, 2020 AT 9:46 AM
Tiny
AH8007
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I hooked a expensive computer to it. The computer is recognizing the crank sensor. It has rpm's.
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Tuesday, March 3rd, 2020 AT 10:47 AM
Tiny
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Okay, what about the voltage to the coils? Did you verify the voltage to them?

Roy
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Tuesday, March 3rd, 2020 AT 11:23 AM
Tiny
AH8007
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No. I do not know, I'm just lost at this point. It does spark sometimes but it is very weak when it does.
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Tuesday, March 3rd, 2020 AT 11:41 AM

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