Top 20 1991 Buick Regal Questions & Answers

In the air inlet duct.

Hello, When looking down at mass air flow you will see A, B, and C also the release on the connector will be at the opposite or bottom of the MAF sensor when reading A, B, and C. OK! Lets start with easy part first, C, pink with black stripe is 12 volts. B, the red with black stripe is ground. A, the yellow with a white stripe is reference voltage sent to ECM to manage fuel trim. Please note this is correct for all GM, PONTIAC, OLDSMOBILE, CHEVRELET, and CADILLAC.

Greetings, I read your question and I think Reliable-Store can help you in this. Here's the site link. Best Manuals

I wonder if the sensor from the junk yard is also bad. Check all of the wiring and connections. You might have to opt for a new sensor.

The combination switch is the one that will cause this, not the main light switch.

You never attempt to fix a seat belt retractor, you replace the seat belt. This is due to the fact it may save your life.

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem. Best Manuals

DIRTY CENSER located in fill tank.

New compressor? Was it filled enough? High pressure switch could be on it's way out. Especially if it did it before the compressor change. The relay could also be going out. Swap it with another.

they have a relay

The two fusible links on G.M. cars used to be behind the alternator. A heavy (appx. 10 gauge) wire on the alternator had a fusible link a couple of inches back from the bolt. Pull on wire to see if the link is burned out. The other link was attached to the starter soleniod . Same test.

no they do not.

The emissions control valve is bad. Get a manual for your car from an auto parts store for the location and removal instructions.

Mass airflow meter needs to be cleaned.

There is a sticker under the hood with that information on it

probably find that the drive belt is missing as it drives both the alternator and power steering pump.

perhaps it is in the transmission

oil level is low, (add oil) or your oil level sensor is faulty or the connector has came off.

misfire, huge gas consumbtion, jerking, hesitation

Low refrigerantBad A/C compressor and/or clutchBad low side A/C pressure switch I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a