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2005 Cadillac STS Power loss

Tiny
ROBATK
  • MEMBER
  • 2005 CADILLAC STS
  • 4.6L
  • V8
  • RWD
  • AUTOMATIC
  • 102,000 MILES
I am having problems with my STS. It won't start. Following the CEL codes, I have installed new plugs, a new Camshaft position sensor on bank 2, a new fuel injector for cylinder 6 and all of this to no avail. I need help or insight on what else it could be.
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Friday, June 6th, 2014 AT 7:47 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Is the engine getting proper fuel pump pressure? Have you checked for spark to the plugs? If the fuel pump pressure is correct, have you checked to see if the injectors are getting power?
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Friday, June 6th, 2014 AT 8:26 PM
Tiny
ROBATK
  • MEMBER
  • 5 POSTS
Going to check fuel pump pressure and compression tomorrow. I also replaced the coil pack on #6 cylinder. It won't start. It just turns over when the start button is pressed. I was dreading gasket problems but it wasn't/hasn't shown signs of overheating or leakage. When I left work yesterday, it was idling rough and sounding like it had an exhaust leak. It went about three blocks and died out. About an hour later it started with the loud sound but a little less noise but still idling roughly. I had it towed home and now it start at all.
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Friday, June 6th, 2014 AT 8:55 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
What trouble codes did you get?
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Friday, June 6th, 2014 AT 8:58 PM

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