Question about 1989 Oldsmobile Ninety Eight

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89/98 olds. regency. its runs for awhile and then shuts off. it also backfires through the exhaust at high rpms

Posted by bekkamk86 on


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  • Oldsmobile Master
  • 2,007 Answers

Probably timing. Aim a timing light at your crankshaft, and see if the mark is jumping back and forth irradically. It should be staying in one spot. If it's jumping around, your timing chain has jumped a cog.
If not the timing, then it's probably bad wires or improper firing order .

Posted on Jan 16, 2012


5 Related Answers


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SOURCE: 89 oldsmobile 98 won't start

If you suspect its a fuel problem best to do a fuel pressure test, you can rent a tester at auto zone and do it yourself. They also can show you how to use it and what pressure it should be. Also if you turn the key to on position you should hear a hum from the gas tank and then a click that is the pump running and the click is the relay, if you don't then the pump isent running, also chk. the fuse and relay, it could be as simple as a blowen fuse or a bad relay.

Posted on May 26, 2009



  • 6 Answers

SOURCE: 1991 oldsmobile 98 fuel filter replacement location?

my fuel filter is located right behind the pass side tire on the inner side of the frame.

Posted on Sep 22, 2009

michigan man

edgar walker

  • 3533 Answers

SOURCE: 1990 olds 98 regency ignition key

you should be able to get one at any GM dealership and i also like to give you this information if you every have any hard to find GM parts its Schram auto & truck parts 1-800-292-1032 and they website is wish you the best of luck Michigan Man.

Posted on Mar 22, 2010


Clint Smock

  • 4669 Answers

SOURCE: a breakdown diagram for a 89 olds regency

I can likely post one. Breakdown of what system?

Posted on Apr 03, 2010


  • 264 Answers

SOURCE: 1995 Olds 98 Regency Elite I'm re-attaching rear

there is a small set screw in the base of the mirror you will need to loosen this and then slide the metal plate out.

Posted on Aug 30, 2010

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