Cranks, no start?

Tiny
TREZZA2K
  • MEMBER
  • 2000 JEEP WRANGLER TJ
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
I have changed my fuses, relays, crankshaft sensor spark plugs, ignition pack, fuel injection, fuel pump primes, can't get to turn over to save my life. Please help
Sunday, April 20th, 2025 AT 1:37 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,144 POSTS
Okay, we need to see if the problem is spark, fuel or compression related, if you upload a short video of the engine cranking, I can tell if the engine is okay not. Also, I would try starting fluid to see if anything changes, here is a video that will help you go over the easy stuff:

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

If you hear the engine sounds funny while cranking you can confirm the engine is okay by doing a compression test, this guide can help:

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

Please go over these guides and get back to us.

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Monday, April 21st, 2025 AT 11:57 AM
Tiny
TREZZA2K
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I will get that video for you. I had a mechanic come out, but he couldn't find it either. However, he believes it's spark related, I sprayed with starter fluid no start, cranks a lot though.
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Monday, April 21st, 2025 AT 1:59 PM
Tiny
KEN L
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If the engine has no spark, one of the most popular causes for this problem is a bad crankshaft sensor which is located at the transmission bell housing. I would try swapping it out, but I would still like to hear the engine crank over. Check out the images (below). Let us know how it goes.
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Tuesday, April 22nd, 2025 AT 10:36 AM
Tiny
TREZZA2K
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I've replaced this part already twice.
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Tuesday, April 22nd, 2025 AT 11:36 AM
Tiny
TREZZA2K
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Vid 1
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Tuesday, April 22nd, 2025 AT 1:10 PM
Tiny
TREZZA2K
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I had battery connected to a battery jumper as well.
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Tuesday, April 22nd, 2025 AT 1:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,144 POSTS
Thanks for the videos, they had, the engine does not sounds good like it has jumped time, lets do a compression test which you can rent the gauge set at the auto parts store for free. Here is a guide to help confirm the issue.

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

Does the engine run when using starting fluid? Please go over these guides and get back to us.
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Wednesday, April 23rd, 2025 AT 8:56 AM

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