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1991 Cadillac Deville 1991 Cadillac Deville hesistates duri

Tiny
ROOSTER CROWE
  • MEMBER
  • 1991 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 201,000 MILES
My 1991 Cadillac Sedan Deville is hesitating severely when I attempt to accelerate. I have checked the Air Filter, Vaccum Hoses, MAP sensor and replaced the Fuel Filter.
None of the above have helped the problem. Local parts store computer reading device will not connect to my Cadillac because it is too old but no trouble indicator lights are illuminated when the engine is running.
Stepping on the gas from idle just causes the engine to 'bogg-down' or 'bottom-out' but does not kill the engine.

Thanks in advance for your time.
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Tuesday, March 24th, 2009 AT 5:11 PM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check fuel pressure and TPS operation
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Wednesday, March 25th, 2009 AT 8:36 AM
Tiny
ROOSTER CROWE
  • MEMBER
  • 2 POSTS
Thank you for your advice and prompt reply. I searched some of your Symptom/Solution Topics on Hesistation and Stalling. Going through your checklist, I was able to determine that the problem was a clogged catalytic converter. Loosening the exhaust manifold from the engine block and starting the car and stepping on the accelerator just a few times I could tell there was a real difference in the way the engine responded!

Thanks again so much for your efforts and time. Without your website I would have been lost.
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Friday, March 27th, 2009 AT 8:37 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Great news so glad you took advantage of site. There is tons of info here and great to hear it helped you out.
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Saturday, March 28th, 2009 AT 10:37 AM

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