Intermittent crank but no start?

Tiny
JIM OMEGA
  • MEMBER
  • 2000 CHEVROLET 1500
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
It will run perfectly for several days, then out of nowhere it won't start for hours, then run good again, then no start suddenly.
Friday, November 25th, 2022 AT 11:58 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,268 POSTS
Hi Jim,

When you have a crank no-start condition, it can be a few different things. However, the problem is usually related to either a fuel issue or an ignition issue.

How long do you need to wait until it will start again? When it does start, do you ever notice smoke from the exhaust or any odd odors? Does this seem to happen only when the engine is warmed up? Let me know.

Next, we need to narrow things down so we can focus on a specific circuit. So, here is what I need you to do.

When it refuses to start, see if it starts using starting fluid. If it does and then stalls, we know it is a fuel-related issue. If there is no change, I need you to check for spark to the plugs.

Here is a link that explains how to do it:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find. Also, let me know if you have other questions.

Take care,

Joe
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Friday, November 25th, 2022 AT 8:38 PM

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