park ave runs rough, shuts off

1999 BUICK PARK AVENUE
19,200 MILES
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MUSTNGT500
  • MEMBER
  • 1 POST
My park ave has been shutting off on me and wont start. Most of time I get black smoke and when it does start it shakes and shuts off. Does it when the car runs hot. The code was. Cylinder 6 was misfiring changed all the fuel injectors and it still does it not sure what else to do?
Oct 19, 2011 at 6:37 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Misfire at no.6 check the sparkplug and compression for this cylinder-

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
Oct 27, 2011 at 12:56 PM
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