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?

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
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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
  • MECHANIC
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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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