20 Most Recent 1991 Oldsmobile Ninety Eight Regency - Page 3 Questions & Answers

is there spark they could share a coil does it smoke could be a head gasket what cylinders are died?

1991 Oldsmobile... | Answered on Apr 30, 2012

Park rod inside transmission is probably broke on the end. Was a BAD problem for a few years.

1991 Oldsmobile... | Answered on Apr 16, 2012

The system you have is Passkey VATS. On your 91 there are 2 ways to bypass this system. One is a partial bypass that works in certain situations, and another that works in ALL situation. This link explains alot and offers solutions to help you beat this.


1991 Oldsmobile... | Answered on Mar 14, 2012

When the engine turns over real fast this indicates that there's no compression. This could be due to a broken timing belt or valve and piston problems.

1991 Oldsmobile... | Answered on Nov 28, 2011

Rough idle is a very common problem on 4 cylinders, but I believe the 98 Regency has a 6 cylinder in it, right?

Sometimes the coil packs get iffy, and sometimes the EGR Valve gets a leak in it causing a rough idle.

When the accelerator pedal is depressed, it can change things so that the engine seems to run smoothly.

However, I would look for codes to see if anything intermittent is occurring in the engine that may need attention.

The OBD-I scanner can help to diagnose the problem, if anything is out of specifications on the engine in question.

The owner will have to find a technician that has such a scanner.

1991 Oldsmobile... | Answered on Sep 28, 2011

If it is like a 1986 caddy I had ,your problem
is a module for the blower & I forget,something to do with the a/c

Anywhy, it has two separate functions & I had the one you have

Mine was around the left front headlight somewhere
It is a dealer part

For now you have to unplug the blower under the hood
in the middle of firewall next to the blower or find and unplug the

1991 Oldsmobile... | Answered on Sep 23, 2011

Remove the distributor cap, and unplug & tape over the pigtail you unplug. As the engine cranks, look to see if the rotor is turning. You may have thrown a timing belt.

1991 Oldsmobile... | Answered on Sep 08, 2011

check the fuse first, after that if the fuse seems ok, check for any vacuum leaks going to the system, you can check for leaks, by spraying carb cleaner around the area, if the motor revs up a little while spraying, thats where your leak is going to be

1991 Oldsmobile... | Answered on Aug 14, 2011

Bad headlight switch

1991 Oldsmobile... | Answered on Jul 12, 2011

how do you replace the dimmer switch on the steering colunm

1991 Oldsmobile... | Answered on Jul 07, 2011

You will need to remove the bolt(s) and then use a gear puller. The crankshaft pulley normally a harmonic balancer also and will be keyed with a drift pin. You should be able rent a puller from Auto Zone or other automotive store.

1991 Oldsmobile... | Answered on Jun 21, 2011

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