Engine wont start What should the compression psi be at?

Tiny
JSALZ
  • MEMBER
  • 1994 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 138,000 MILES
What should the compression psi be at?
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Saturday, February 18th, 2017 AT 9:51 AM

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Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Hello,

With this many miles the compression should be between 125 and 140.

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

Please use 2CarPros anytime, we are here to help and tell a friend.

Best, Ken
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Monday, May 31st, 2021 AT 12:45 PM
Tiny
JSALZ
  • MEMBER
  • 13 POSTS
1994 ford f150 has spark fuel pressure and compression and still no start
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Monday, May 31st, 2021 AT 12:45 PM
Tiny
KEN L
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  • 42,554 POSTS
Are the injectors getting a trigger signal? Here is a guide to help you test the problem.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Please let us know what you find.

Best, Ken
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Monday, May 31st, 2021 AT 12:45 PM
Tiny
JSALZ
  • MEMBER
  • 13 POSTS
Has little vacuum pressure, all hoses are connected. It runs fine with mass air flow sensor unplugged, changed it cause I thought it was the problem but wasn't. Getting fuel pressure, any suggestions?
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Monday, May 31st, 2021 AT 12:45 PM
Tiny
KEN L
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Lets run the trouble codes to see what the computer says,

https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval

Please let us know happens.

Best, Ken
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Monday, May 31st, 2021 AT 12:45 PM

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