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2003 Pontiac Aztek fuel pump

Tiny
JREED46992
  • MEMBER
  • 2003 PONTIAC AZTEK
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 189,000 MILES
I have r&r fuel pump and fuel pressure regulatior and still will not start I am getting spark also. If I spray starting fluid in it I will start and drive where ever u want to go.
Friday, November 14th, 2014 AT 8:24 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
So it requires starting fluid to get started, but once started it's fine. Is that correct? If so, have you checked the fuel pump pressure to make sure it isn't on the weak side (even though the pump is new)?
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Friday, November 14th, 2014 AT 8:35 AM
Tiny
JREED46992
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  • 5 POSTS
Yes I have checked the fuel pressore and I have also changed the fuel filter. And after useing starting fluid it is fine unless you let it sit for about 30 min
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Friday, November 14th, 2014 AT 8:43 AM
Tiny
JACOBANDNICKOLAS
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If pressure is within spec, I would suspect you have a bad coolant temp sensor. The sensor tells the computer how rich or lean to make the fuel mixture based on temperature. If it thinks it really hot, it will make it too lean. On the other hand, if it thinks it is too cold, it will make the mixture too rich. Do you have a live scanner that can check what the sensor is telling the computer?
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Friday, November 14th, 2014 AT 8:48 AM
Tiny
JREED46992
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  • 5 POSTS
No I do not have a scanner but would a local part stores scanner work for the info I need
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Friday, November 14th, 2014 AT 9:01 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It is really based on the type of scanner they have.
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Friday, November 14th, 2014 AT 9:21 AM

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