Question about 1991 Buick Century

1 Answer

1991 buick century runs great. 20 minutes dies, shuts off. no signals no signs, no lights come on. nothing. Wait 10-15 minutes starts up, then dies in 5-10 minutes. I can shift to neutral while at stop lights and keep it idle, 50/50 it will stay or die. I put in brand new alluminum radiator. I'm in process of thermostat, but very hard to get to. Mechanic did diagnostic test on, or so he says, and says that car gets up 220 degress and shuts off, as safety precaution. He said he would start at water pump and thermostat, but can't guarantee it will fix my problem. I just moved from cold weather to florida. It used to run all day and not shut off unless it got real hot outside but then I could drive for 60 miles and be alright. My buddy thinks i need to flush coolant system and replace thermostat because the computer may be reading too hot when its not and shutting off the car. Dude, I'm real confused and sad, because I love her, she's a little beauty! I want to help her and drive her to find a job. She's been sitting for about three weeks. At night she drives great, it must be the cooler temperature. TELL ME WHAT YOU THINK!!! PLEASSSSSSSSSE! Thank You All! Joe Licata.

Posted by on

  • joe licata Apr 23, 2009

    I can't get to the thermostat. It's under throttle body and between exhaust manifold. It's cold now and I took off the air intake, but it's still too hard. I can't get to one bolt on the exhaust to take off, and I can't get one bolt off the throttle body its all too crammed. And I'm not about to start taking all the little tubes, and cables and lines on the throttle body apart, without knowing what they are. I'm trying to get a ride to the store to buy the Hanes
    Booklet for my car, but If I can't then I'm looking to the internet to learn how any suggestions????

  • joe licata Apr 24, 2009

    190-195 degrees


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert that has over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 260 Answers

When you remove your thermostat check the number stamped on the thermostat. In cold weather you want a high number and opposite cold weather. Right back with number

Posted on Apr 23, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Car runs then after stopping will not start

do you stop your car then dies? or you turn the key off and will not restart?

Feb 26, 2016 | 2002 Buick Century

1 Answer

My 2002 Buick century wont (crank) turn over ..jumped solenoid,it turns over but won't start ..checked all fuses and relays.. good happened after attempting to rewire front turn signal broken plug

Turn signal plug should have nothing to do with it not starting. Disconnect the battery for 10 to 15 minutes. Then try again with the key.
When you jumped the solenoid, it would start because the key may have not been in the run position. So the Security light was on, and did not energize the fuel pump.

Disconnect the battery as stated.

May 27, 2015 | 2002 Buick Century

1 Answer

My buick runs but after about 20 minutes it shuts off and wont start it not to hot and has plenty of spark and gas

Check the EGR valve the next time is shuts off within 20 minutes. The valve should be opened. If not replace that valve

Jul 17, 2010 | 1988 Buick Century

1 Answer

1991 buick century emergency flashers work turn signals do not

This more then likely is going to be your signal switch. It may just have gone bad being almost 20 years old. You can find these all over in junk yards for almost nothing.

Apr 05, 2010 | 1991 Buick Century

1 Answer

Starts and runs great for 20 to 30 sec shuts off when i try to

Sounds like possible crank sensor failure,will work till warms up they have to cool,then will work again.Also monitor fuel preasure,fuel pumps can act this way too.

Jun 17, 2009 | 1991 Buick Century

2 Answers

91 Buick Century 2.5 L brake light on & battery light on

For the Brake light to stay on and the fluid is up...sounds like your sensor is playing dead......

For the battery to die after only (4) have a very big drain on the battery itself.....without the vehicle right here to look at would be very hard to even guess...electrical problems are a hands on chore...

I'd take it to your garage/mechainc

Jan 03, 2009 | 1991 Buick Century

Not finding what you are looking for?
1991 Buick Century Logo

415 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

75744 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8123 Answers

Are you a Buick Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides