Would a bad spark plug prevent the vehicle from starting?

Tiny
MYVANS
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 146,000 MILES
Would a bad spark plug make the van not start?
Do you
have the same problem?
Yes
No
Monday, August 1st, 2022 AT 2:58 PM

5 Replies

Tiny
SQM
  • EXPERT
Hello,

Generally speaking, an engine will need spark, fuel and compression to start.
So, if the spark plugs are not producing spark, then yes, it won't start.
However, there are a number of reasons why an engine might not start. It could be the spark plugs, also it could be due to a fuel delivery issue or compression.

https://www.2carpros.com/articles/car-not-running-advanced

Is it cranking over and not starting?

Let us know a little more details of what you are experiencing.

Thank you.
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Monday, August 1st, 2022 AT 7:20 PM
Tiny
MYVANS
  • MEMBER
It cranks but dos not start.
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Wednesday, August 3rd, 2022 AT 12:40 AM
Tiny
SQM
  • EXPERT
Follow that guide I provided you on the first response. It will walk you thru how to check for spark, fuel and other crank no start issues.
Let me know what you find.
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Wednesday, August 3rd, 2022 AT 8:16 AM
Tiny
MYVANS
  • MEMBER
Okay, one more thing. The security light stays solid it blinks three times then is solid and when I try to start dashboard lights come on, but my gauges don't move anymore.
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Wednesday, August 3rd, 2022 AT 3:42 PM
Tiny
SQM
  • EXPERT
If the security light flashes then the immobilizer might be triggered.
Try disconnecting the battery for a few minutes and reconnect and see if that resets the light.

https://www.2carpros.com/articles/how-to-reset-a-security-system
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Wednesday, August 3rd, 2022 AT 8:27 PM

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