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Crank no start

Tiny
PFANNENSTIEL47
  • MEMBER
  • 2005 DODGE DURANGO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 225,000 MILES
Have a crank no start; replaced throttle body, crank shaft position sensor and cam shaft position sensor but to no avail. It just cranks until I get a back fire through throttle body. Have fuel and have spark.
Monday, December 17th, 2018 AT 7:51 AM

9 Replies

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

The first thing I would do is to check the compression to see if the chains have moved.

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

Backfiring is usually an indication of a timing issue.

https://www.2carpros.com/articles/engine-backfires-while-running

Were there any codes that lead you to replace all those parts?

Roy
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Monday, December 17th, 2018 AT 8:46 AM
Tiny
PFANNENSTIEL47
  • MEMBER
  • 6 POSTS
Yea, had a throttle body light pop up and I know Chrysler has an issue with the sensors so it was just a shot in the dark.
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Monday, December 17th, 2018 AT 1:58 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Got it.

I would start with the compression check to be sure it is not a timing issue.

Roy
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Monday, December 17th, 2018 AT 8:14 PM
Tiny
PFANNENSTIEL47
  • MEMBER
  • 6 POSTS
So timing is good. Reset the timing tried to fire it up and almost started but it is still flooding out and backfiring. It will not bring any codes except p0700 which is a transmission sensor.
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Thursday, December 20th, 2018 AT 9:57 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, did you do a compression test to see if there is enough to let the engine run?

Roy
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Thursday, December 20th, 2018 AT 10:10 PM
Tiny
PFANNENSTIEL47
  • MEMBER
  • 6 POSTS
So no compression on cylinders 1, 3, 5, 7, 6, 8.
120 lbs of compression on cylinders 2, 4.
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Friday, December 21st, 2018 AT 3:49 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay.

You have internal engine damage. The heads will have to come off.

Most likely has valve damage from the timing being off.

Roy
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Friday, December 21st, 2018 AT 3:53 PM
Tiny
PFANNENSTIEL47
  • MEMBER
  • 6 POSTS
Thank you sir, that will be another days project.
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Friday, December 21st, 2018 AT 3:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yep.

You are welcome.

Always glad to help.

Roy
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Friday, December 21st, 2018 AT 4:06 PM

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