Engine will not start?

Tiny
ZENMYSON
  • MEMBER
  • 2010 HOLDEN COMMODORE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 212,000 MILES
Wont start just winds over. There is spark what is going on?
Thursday, March 4th, 2010 AT 4:10 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

An engine will need spark, fuel and compression to start. Mission either of these will not allow the engine to start.

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

Check to see if you are getting fuel. Can you hear the fuel pump come on when you turn the key to the on position?
If the pump does not come on then you will have to check the fuel pump relay. It is located under the hood fuse box. Check the relay for any corrosion or burnt pin(s).
You can also test the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the fuel pump comes on then check if you have fuel pressure at the rail.

Here is a helpful video of how to check fuel pressure:

https://youtu.be/aITQclp7zIE

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

Inadequate fuel pressure can be cased by a clog in the line, it can be a restricted fuel filter or a bad pressure regulator that is not allowing fuel to the engine.

Please let me know of any questions.
Thank you.
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Thursday, September 23rd, 2021 AT 9:19 AM

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