Gas leak??

2002 PONTIAC GRAND PRIX
150,000 MILES • 6 CYL • FWD • AUTOMATIC
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RENDE75
  • MEMBER
  • 1 POST
Engine's power is fine on flat road but weak on hills.
Also, when enigine stops, there is a strong smell of gas but no visible gas leak.
What's causing these problems?
Nov 18, 2010 at 12:22 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Probable causes of an engine running rich are as follows:

1.Excessive fuel pressure can be cause by restricted fuel return line
2.Defective Oxygen Sensors.
3.Leaking injectors and fuel pressure regulator.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
Nov 18, 2010 at 12:23 PM
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