power problem

1990 CADILLAC DEVILLE
150,000 MILES • V8 • FWD • AUTOMATIC
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MACON
  • MEMBER
  • 2 POSTS
1990 Caddy Coupe deville 4.5 Engine. Car slows down on incline.Won't pull a hill. Drives well on flat surface changes gears fine
Jun 9, 2011 at 9:38 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Check the exhaust system for restriction could be a clogged catalytic converter -do a backpressure test to confirm it
Jun 10, 2011 at 2:31 AM
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MACON
  • MEMBER
  • 2 POSTS
Thank you. The auto shop told me the checked the converter and exhust muffler
Jun 10, 2011 at 6:25 AM
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