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95 STS Power Loss

Tiny
IN2TIME
  • MEMBER
  • 1995 CADILLAC SEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 150 MILES
95 Cadillac STS extreme power loss. Feels like it is climbing a hill towing a truck. Works hard with no results. Gets worse each day. Also has some surging at moderate throttle. Replaced EGR Valve and MAP Sensor. Could it be the Cat or Idle Air motor? How do I check?
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Saturday, July 16th, 2011 AT 6:17 AM

1 Reply

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Have you checked to see if you have any codes in the computer yet?You could have a plugged cat take it to a exhaust shop and have them do whats called a exhaust back pressure test.
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Saturday, July 16th, 2011 AT 7:33 AM

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