Cranks will not start

Tiny
MUTUALENLOE
  • MEMBER
  • 2002 MITSUBISHI LANCER
  • 161,000 MILES
My car acts like it wants to start. It is not turning completely over; lights, radio, everything comes on just will not turn over. Changed spark plugs, changed sensor, and coil nothing? Can you give me any suggestions?
Wednesday, March 7th, 2018 AT 6:33 AM

5 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,738 POSTS
You are describing two different symptoms. "Turning over" means the starter is cranking the engine. If it is not doing that, we need to diagnose the starter system.

If the starter is cranking the engine normally, but it does not run, that is different. The place to start is with checking for spark and fuel pressure. If both of those are missing, the best suspects are the crankshaft position sensor and the camshaft position sensor. Your mechanic would connect a scanner to read the diagnostic fault codes. Those direct us to the circuit that needs further diagnosis. It is hard to know where to start if you do not have access to a scanner.
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Tuesday, April 20th, 2021 AT 11:45 AM
Tiny
MUTUALENLOE
  • MEMBER
  • 3 POSTS
I changed spark plugs and camshaft sensor. It still will not start. It acts like it wants to start. What to do? The response I got has me confused.
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Tuesday, April 20th, 2021 AT 11:45 AM
Tiny
MUTUALENLOE
  • MEMBER
  • 3 POSTS
The engine is cranking just not starting. I changed spark plugs, coils, and a sensor behind or by coils. Nothing please help my jobs are at risk.
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Tuesday, April 20th, 2021 AT 11:45 AM
Tiny
RENEE L
  • ADMIN
  • 1,257 POSTS
Hi MUTUALENLOE,

Here is a link to an informative article from this site with step by step instructions and pictures and a video on what to check for when your vehicle cranks, but will not start.

https://www.2carpros.com/articles/car-cranks-but-wont-start

If you need any further help please come back to the site as we are always happy to help.

Thank you for visiting 2CarPros.

Kindest regards,

Renee
Admin

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Tuesday, April 20th, 2021 AT 11:45 AM
Tiny
CARADIODOC
  • MECHANIC
  • 33,738 POSTS
There's one more thing that is required for the engine to run. That is all the events must occur at the right time. The impression I get from your description of the symptoms is the timing belt may have jumped a few teeth. If your engine is of the "interference" design, continuing to crank it can cause the timing belt to jump more teeth. If that happens, some of the valves will be bent. That will turn the repair into a very expensive one. I'd recommend checking the timing belt before going any further. At the mileage you listed, it's nearing the time it should be replaced for the second time for preventive maintenance.
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Tuesday, April 20th, 2021 AT 11:45 AM

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