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Is this my fuel pump?

Tiny
AMORRILL
  • MEMBER
  • 2005 CHEVROLET ASTRO
  • 210,000 MILES
After the car warms up (30 min drive) it will not start after sitting an hour but will start after 4 hour. Never have a problem when the car sits overnight. Dealer can not find the problem, the tell me te fuel preassure is good, and they did replace a fuel flow sensor (that seemed to coorect the problem but was back in two months). From what I am seeing on other web sites it could be the fuel pump or the air regulator. What is you take on this issue. Have you seen it before?

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Tuesday, February 21st, 2012 AT 10:25 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Next time it refuses to start don't wait for nothing look for fuel and spark-start here
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Tuesday, February 21st, 2012 AT 10:41 PM
Tiny
AMORRILL
  • MEMBER
  • 4 POSTS
Spark is ok, I can only go by what the deal told me, they tell me that there is fuel pressure.
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Tuesday, February 21st, 2012 AT 11:07 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Is it the correct fuel pressure? Best check yourself to be sure if its within specs
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Tuesday, February 21st, 2012 AT 11:48 PM
Tiny
AMORRILL
  • MEMBER
  • 4 POSTS
I will need to get a fuel pressure gauge. Would the fuel pump explain not being able to start after one hour sitting but starts with not hisitation after 4 to 5 hours?
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Wednesday, February 22nd, 2012 AT 1:20 PM
Tiny
RASMATAZ
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Check the fuel and spark-could be spark problem instead of fuel verify both
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Wednesday, February 22nd, 2012 AT 2:52 PM
Tiny
AMORRILL
  • MEMBER
  • 4 POSTS
It is not a spark issue, Also not that you have put this under an 05 Astro, this is an 05 OPTRA.
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Wednesday, February 22nd, 2012 AT 3:03 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Since its not a spark and fuel issue -check engine compression-this time I want some testing results when you comeback-
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Wednesday, February 22nd, 2012 AT 8:01 PM

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