Question about 1994 Buick Century

1 Answer

1994 Buick Century - high idle, hesitation @ speed & little power

'94 century - bought with very low miles. Has had little to no power at times since purchase.

When I first start up it seems to idle very high and then slow down (but this model has no tach so it's hard to say). Idle also seems rough at times.

For the first 4-7 minutes of driving (seems to be longer in winter) I have all the acceleration I would expect from 160 hp but without fail the engine bogs down and sounds odd after that time. The lack of power varies in intensity from drive to drive but it (and my fuel economy) seems to be far worse in the winter time.

When the engine is bogged down it also seems very jerky shifting from 1st into 2nd. Additionally going uphill seems harder than it should. It gets so bad sometimes that I have the throttle 2/3 of the way to the floor to keep up with highway speeds. Also when the engine is not so severely bogged down I seem to have downshift capability at highway speed (meaning I can get a good kick of acceleration when I floor it) but when the engine is REALLY bogged down I don't get anything at all.

Another possibly unrelated issue is that the coolant temperature gauge is always offscale low except for a few rare times in the summer when I have seen it middle scale. Fuel economy in the summer is FAR better than winter. This is to be expected, I know, but I'm talking on a scale of about 2/3 the distance to a tank in the winter time.

I have put a lot of fuel injector cleaner in with no improvement. I have had the catalytic converter changed with slight (possibly imagined improvement). I have had the Mass Air Flow sensor changed (and later cleaned out) with slight improvement. Nothing seems to fix it.

The full power thing within the first 5 minutes of start indicates an electrical problem to me. I've had people suggest that the problem is my fuel pump but I don't hear anything suggesting that. This car sat through every winter from 1994 until 2007 and in that time accumulated very low miles.

Any ideas would be GREATLY appreciated.

Posted by on

  • pcgeek08 May 11, 2010

    Sta-Bil, was it put in the gas tank for extended periods of time?



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Have u checked to make sure that the fuel filter isn't plugged, and it could be possible that the fuel pump is bad -being cracked or haveing a bad seal in it allowing fuel to leak back in the gas tank, as soon as your fuel pump warms up the leak would expand dropping your power

Posted on Feb 08, 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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only 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

How to fix high rpm start up in buick century 2003

run fault codes to find reason for the low engine rpm.. hard steering comes when the engine stops and there is nothing to turn the power steering pump.

Dec 08, 2013 | 2003 Buick Century

1 Answer

Fast idle 1994 buick century

If it only started after the hoses were replaced, it suggests an air leak was introduced during the work.

Nov 08, 2013 | 1994 Buick Century

1 Answer

Power window motor remove replace

I would go to scrap yard get new one.low mileage car.

May 10, 2013 | 1994 Buick Century

1 Answer

How do you tighten waterpump pulley on 94' buick

How to Change a Water Pump on a 1994 Buick Park Avenue. ... Thread all the bolts onto the pump finger tight, then tighten the short bolts with your wrench in ...
hope this will help

Jan 26, 2012 | 1994 Buick Century

1 Answer

I have a 94 buick century. both front power windows quit working at the same time. Replaced master switch panel, still not working.

faulty or bad relay. Get a haynes manual to find where it is located. Gently tap the relays a few times to make sure that they aren't just stuck open.

Sep 17, 2009 | 1994 Buick Century

1 Answer

94 Buick Century 2.2 L4

Seems as though you've got it covered...Try adding "SeaFoam" ($9) from Advance Auto Parts and add it to your for at least 100mi. Good Luck

Jun 27, 2009 | 1994 Buick Century

1 Answer

94 buick century whenever it goes up a hill will run sluggish. When coming to a stop, will also run sluggish. Otherwise it runs well in park or at higher speeds.It happens all the time...when stopping for...

This could be a problem with your plugs or plug wires, throttle position sensor. Did you just put some new tires on? When you put tires/wheels on that are bigger than was originally on there then it can rob power from the engine. Another thing that I would check would be for vacuum leaks. Hook a vacuum gauge up to a vacuum port on the engine and read the gauge. That will give you a better idea about what is really going on vacuumwise. Hope this helps.

Jun 10, 2009 | 1994 Buick Century

1 Answer

1994 buick century headlights not working

Go through all your fuses, Dim lights run on a separate fuse.

May 07, 2009 | 1994 Buick Century

1 Answer

94 buick stalls and hesitates

check fuel pump should be 41 to 47 psi.

Apr 26, 2009 | 1994 Buick Century

3 Answers

1998 Buick Century losses significant power at lower speeds

Possibly the EGR valve or TPS sensor if you have CEL codes. Check fuel pressure and if low change fuel filter if it is still low replace the fuel pump I beleive it is suppossed to be 41 to 47 psi. Pretty easy to replace fuel filter the Buick Century has a cover you remove in the trunk to access the fuel pump making the change very easy, if you can fit in the cramped space of the trunk.

Mar 16, 2009 | 1998 Buick Century

Not finding what you are looking for?
1994 Buick Century Logo

994 people viewed this question

Ask a Question

Usually answered in minutes!

Top Buick Experts


Level 3 Expert

77202 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides