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Will not start

Tiny
MARKEE JACKSON
  • MEMBER
  • 1989 CADILLAC ELDORADO
  • V8
  • AUTOMATIC
  • 150,000 MILES
My just cut off on me while I was driving. Ran hot. It will turn over but will not stay running.
Friday, March 2nd, 2018 AT 5:48 PM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

Do you know the engine size?

Roy
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Friday, March 2nd, 2018 AT 5:51 PM
Tiny
MARKEE JACKSON
  • MEMBER
  • 4 POSTS
4.5 liter V8.
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Friday, March 2nd, 2018 AT 6:00 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, you need three things to run, spark, fuel and compression.

Since it ran hot, I would start with compression. Those aluminum engines cannot take overheating without damaging the head gaskets.

Start there.

Roy
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Friday, March 2nd, 2018 AT 6:04 PM
Tiny
MARKEE JACKSON
  • MEMBER
  • 4 POSTS
How can I tell if it’s a blown head gasket?
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Friday, March 2nd, 2018 AT 6:09 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
A compression test will be a good start. Low compression is an indicator, while the plugs are out for this test, a leak down test will confirm. That is a tool that injects air into the cylinder and you watch for coolant movement in the radiator.

Roy
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Friday, March 2nd, 2018 AT 6:12 PM
Tiny
MARKEE JACKSON
  • MEMBER
  • 4 POSTS
Okay thanks.
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Friday, March 2nd, 2018 AT 6:14 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Roy
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+1
Friday, March 2nd, 2018 AT 6:17 PM
Tiny
RYAN L
  • ADMIN
  • 261 POSTS
Hello MARKEE JACKSON,

Here is a link to an informative article with step by step written instructions, pictures and a YouTube video on how to conduct a compression test:

https://www.2carpros.com/articles/how-to-test-engine-compression

If you need any further help please come back to this post. We are always happy to help.

Thank you for visiting 2CarPros.

Kindest regards,

Ryan
Admin
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Saturday, March 3rd, 2018 AT 1:05 PM

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