1997 Cadillac Deville hesitation

1997 CADILLAC DEVILLE
125,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
WISTON
  • MEMBER
  • 1 POST
started using regular unleaded gas instead of preminum which the manuel said to use .IAM hearing knocking and hesitation in the engine the service engine light keeps flashing.Want to know if there is anything i can put in the gas tank to unglued the fuel injection
Dec 11, 2009 at 6:27 PM
Advertisement
Avatar
FACTORYJACK
  • CERTIFIED EXPERT
  • 4,159 POSTS
Are you sure it is not an ignition misfire, rather than sticking injectors. Regular unleaded should not have caused sticking injectors, it should have maybe had some pinging at the worst. The flashing SES indicates a catalyst damaging misfire. You could have a faulty coil, plug, wire, low/no compression, or a faulty injector.
Dec 11, 2009 at 11:33 PM