1999 Oldsmobile Aurora Hard to start when warm

1999 OLDSMOBILE AURORA
138,000 MILES • V8 • FWD • AUTOMATIC
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BK1212
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  • 1 POST
My 1999 Olds Aurora with Northstar V8 (138000 miles) starts hard when the engine is warm and has been sitting for more than 5 minutes. When the engine is cold it starts right up. When the engine is warm and I start it immediately after turning it off, it starts right up. When the engine is warm and I let 5 or more minutes go by, it will not start unless I give it a little gas while cranking. It takes atleast 5 seconds of cranking to get it to start and the exhaust smells like it is very rich.

I replaced the spark plugs and wires with no improvement. The check engine light has not come on.
Jan 13, 2008 at 10:16 PM
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2CARPRO JACK
  • ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
Check for a blown fuel pressure regulator. It is located on the fuel rail and has a vacuum line to the intake. If fuel is present in the vacuum line, replace the regulator
Jan 14, 2008 at 5:49 PM
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MASTERTECHTIM
  • ASE Certified Mechanic
  • 4,750 POSTS
  • ASE Certified Mechanic
i second that motion. replace fuel pressure regulator.. hope this helps
Jan 14, 2008 at 5:53 PM
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