Park ave runs rough, shuts off

Tiny
MUSTNGT500
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 19,200 MILES
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?
Thursday, October 20th, 2011 AT 1:37 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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
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Thursday, October 27th, 2011 AT 7:56 PM

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