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Does not turn on if it starts

Tiny
ABECERRIL
  • MEMBER
  • 1994 CHEVROLET LUMINA
  • 99,000 MILES
My van lumina 94 engine 3.8, I wait 10min. And turn back on and test ignition module, crankshaft sensor and wiring connections. I walk several miles, turn it off and then it does not turn on I wait a few minutes and it turns back on, sometimes it turns off driving
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Monday, October 10th, 2011 AT 10:40 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
If you have been chasing an ignition issue is that just because you suspect it is ignition related?

It does sound like a crankshaft position sensor but if you replaced it then we need to move onto the other possible causes.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Let's start with fuel pressure to find out if we have a fuel pump relay or pump issue.

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

If the pressure is not dropping, then we need to start with this guide and the other possible causes it talks about.

https://www.2carpros.com/articles/engine-stalls

I attached the wiring diagrams below for the powertrain system.

We are lastly going to have to check the power coming to the coil and make sure it is not dropping out.

https://www.2carpros.com/articles/how-to-check-wiring

Let's run through this info and go from there.

Thanks
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Tuesday, January 25th, 2022 AT 5:35 PM

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