1991 cadillac fleetwood running rough

1991 CADILLAC FLEETWOOD
65,000 MILES • V8 • FWD
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TERRILANDRY0214
  • MEMBER
  • 1 POST
what can I do with a 1991 cadillac fleetwood after I used regular gas and it is missing real bad. What can I do I have been putting premium but it is not running good
Dec 5, 2010 at 5:43 PM
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FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
It is quite possible that the fuel was not the problem in the first place, and you have a hard failure of another type. It could have a faulty injector, or secondary ignition type problem causing a misfire. Regular fuel should not cause the problems once thought iin the past, as long as it is from a quality source.
Dec 8, 2010 at 8:43 PM
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