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1991 Buick Century engine light

Tiny
KENNYANDDONNA
  • MEMBER
  • 1991 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 94,200 MILES
OK, here we go, when the engine light comes on the car runs at a fast idle, speed odometer doesn't work. When the engine light goes off, the car doesn't want to run, and if it is running, it is missing.
Sunday, October 4th, 2009 AT 10:35 AM

1 Reply

Tiny
JALOPYPAPA
  • MEMBER
  • 467 POSTS
You need to retrieve any trouble codes associated with the check engine light coming on, and that may give you a clue what's wrong.

Get a short piece of stiff wire or a paper clip. Look under the dash below the steering wheel and find a 12-pin female plug in two horizontal rows of six. Push one end of the wire or paper clip into the upper-right-most hole and the other end in the hole just to the left of that one. Then turn the key to on (but do not crank the engine). The check engine light will flash two-digit codes. The first one will be 12 (one flash, pause, two flashes). Then there will be a longer pause and perhaps more flashed codes. Write them down. THe cycle will repeat as long as the key is on. Then look them up. Google GM and OBD1 and codes and you should find a list. https://www.2carpros.com/trouble_codes/obd2
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Monday, October 5th, 2009 AT 12:18 PM

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