SPONSORED LINKS

Cranks but will not start

Tiny
DALTON59
  • MEMBER
  • 2002 JEEP LIBERTY
  • 3.7L
  • V6
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Car was missing and then it would not start at all. Have replaced plugs crank sensor, cam sensor and coils. Still fires but will not start.
Wednesday, December 5th, 2018 AT 10:05 AM

19 Replies

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

Are there any codes stored in the PCM?

https://www.2carpros.com/articles/check-engine-light-top-ten-reasons

Have you tested for fuel pressure? You can try to spray some starting fluid into the air filter and see if it starts and stalls. That will tell us if it is fuel related.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Did you check for spark?

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

Lastly, did you test for compression?

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

You need fuel, spark and compression for this to run.

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, December 5th, 2018 AT 12:14 PM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
No codes. Have checked all that you asked. It has me stumped Tried starting fluid too it did nothing. Did not even try to start it just kept cranking.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:15 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
Everything works fine but it just will not start.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:16 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Did you verify spark at the spark plugs?

What was the compression?

Roy
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:29 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
My friend is a mechanic and he did both and said the compression was good.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:35 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
He is thinking it may have jumped time, but no indication it has.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:36 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
He is a mechanic? If the compression is good, then it is not the timing. If the timing was an issue compression would be off.

He missed something here. I would look for someone else to help you with your checks.

Roy
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:49 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
Is there anything else that you could think it could be? I am scratching my head here.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:58 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
The guy I had check compression is only mechanic I know.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 10:59 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You need to start with basics.

1. Spark

2. Fuel pressure. Need exact reading not it is okay.

3. Compression. Need exact numbers.

If you cannot do it yourself, I would consider a mobile tech to at least do this portion of the testing.

Roy
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 11:03 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
He had exact reading I just did not write it down.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 11:17 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, I want to help but remember I am here and not there and I need exact information.

Keep me updated.

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 11:19 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
No problem. Thank you. I will do that.
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 11:41 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Roy
Was this
answer
helpful?
Yes
No
Thursday, December 6th, 2018 AT 11:54 AM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
Just an update here. Timing chain gear broke.
Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2018 AT 1:00 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Oh, sorry to hear that.

Most likely you have damaged valves from that issue. Then I would like to know what caused it to break. They do not just break for no reason.

I would be ready to consider changing the engine at this point.

Roy
Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2018 AT 1:19 PM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
Picture.
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2018 AT 2:03 PM
Tiny
DALTON59
  • MEMBER
  • 12 POSTS
Think it is called the key way.
Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2018 AT 2:04 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, that is correct.

Roy
Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2018 AT 2:09 PM

Please login or register to post a reply.

Related Engine Not Running Content

How to fix an engine that wont start
VIDEO
How to fix an engine that wont start
Instructional repair video
Engine Not Starting
GUIDE
Engine Not Starting
Over the past 20 years at 2CarPros we have identified the top problems that are easily fixed. This guide can save you a trip to the repair garage or calling a tow truck and...
VIEW MORE

Sponsored links