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Code P0336, Now all I get is puffing sound when cranking but start?

Tiny
AKILLEON SAMPSON
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 242,000 MILES
Originally told the ignition switch was issue, changed and did 30 minute relearn, got scanner code P0336, changed crankshaft position and camshaft sensor and wiring (had a broken wire). Now all I get is poofing sound when cranking but won't turn over. 60 PSI fuel pressure, changed relays and fuses still no start. Thinking it may be a timing chain issue but want to rule out everything before I strip the front accessories off.
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Saturday, February 6th, 2021 AT 7:20 PM

68 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

I've attached picture diagnostic steps below relating to code P0336 for your truck. Let us know what you find and keep us updated. Hope this helps and thanks for using 2CarPros.
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Saturday, February 6th, 2021 AT 7:55 PM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Will keep you updated Danny, as of now will not start so some tests can't be done.
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Sunday, February 7th, 2021 AT 5:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

I would do a compression test. That will verify if you have a failed timing chain.

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

The compression should be 140-160. If they are all low, the timing chain could be the issue.

I attached a you tube video from us for the timing chain installation.

https://www.youtube.com/watch?v=mrp9YXPaYFg

Roy
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Sunday, February 7th, 2021 AT 9:55 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
ASEMASTER6371 greatly appreciate that advice. That actually skipped my mind will keep you guys informed soon as work is resumed on truck.
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Sunday, February 7th, 2021 AT 12:07 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

We are always glad to help.

Roy
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Sunday, February 7th, 2021 AT 12:10 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Yes, keep us updated and let us know what you find. If you need any additional diagnostic steps or diagrams let us know we're here to help. Thanks again for using 2CarPros.

Danny-
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Sunday, February 7th, 2021 AT 4:32 PM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Update: pulled all plugs (all looked like image), replaced plugs. Compression test all cylinders at 120-125 lbs still no start. Still has backfiring (popping and poofing from intake and exhaust).
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Sunday, February 21st, 2021 AT 6:09 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Compression is too low. It should be 140-160. This sounds like you need a timing chain.

https://www.2carpros.com/articles/how-a-timing-belt-works

I attached one of our youtube videos for the procedure.

https://www.youtube.com/watch?v=mrp9YXPaYFg&t=1s

Roy
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Monday, February 22nd, 2021 AT 1:57 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Darn, okay.
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Monday, February 22nd, 2021 AT 3:03 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Keep us updated.

Roy
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Monday, February 22nd, 2021 AT 3:12 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Definitely will.
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Monday, February 22nd, 2021 AT 3:12 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Thank you for using 2carPros.

Roy
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Monday, February 22nd, 2021 AT 3:13 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Okay, today I once again went while the basic steps from checking on the scanner to see that it still showed the CPK was malfunctioning or that it possibly was touching the reluctor wheel. I also checked different points of ground at the rear of the motor to the firewall and also at the front of the motor to the battery. Upon checking the spark plugs and wires I decided to test the coils 1 by 1 for each cylinder I noticed that on the driver's side the 1st 2 cylinders had no spark the 3rd cylinder had intermitted spark in the last cylinder had no spark I ran out of time before got dark so I couldn't check the passenger side but when I would place a screwdriver close to the engine block and the coil the motor seem to almost start the motor seem to almost start. Now I may be wrong but I am assuming that it could possibly be a ground issue?
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Tuesday, February 23rd, 2021 AT 7:26 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Okay, I attached the location f the ground for you for the injectors. Clean the connection and make sure it is tight.

Roy
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Wednesday, February 24th, 2021 AT 12:56 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Just curious to know if any progress has been made. Let us know if you need any further instruction or diagrams. Keep us updated as to what you find. Thanks again for using 2CarPros.

Danny-
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Saturday, March 6th, 2021 AT 3:24 PM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
I've rewired the CPK, changed cpk and cam sensors, spark plugs, wires, check injectors with noid tester, grounded CPK to body. Everything but open up the motor but still no luck.
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Saturday, March 6th, 2021 AT 6:34 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Did you check for power to the crank sensor itself?

Roy
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Sunday, March 7th, 2021 AT 3:32 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
Yes, that is when I grounded cpk to body. I checked blue pin 21 at PCM (cpk ground) no ground.
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Sunday, March 7th, 2021 AT 8:26 AM
Tiny
ASEMASTER6371
  • MECHANIC
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What was the voltage?

I attached the connector diagram. The light green should have 12 volts.

Roy
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Monday, March 8th, 2021 AT 2:14 AM
Tiny
AKILLEON SAMPSON
  • MEMBER
  • 33 POSTS
12 volts.
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Monday, March 8th, 2021 AT 10:17 AM

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