engine sludge and performance

10

Asked by Sep 19, 2009 at 05:54 PM about the 2001 Buick Century

Question type: Maintenance & Repair

I have a 2001 Buick Century as my first car given to me by my parents, and it has over 120k miles on it.  Currently, I drive it about 65 miles a day 5 days a week to get to college and back.  When accelerating to highway speed (say, 60mph) or while trying to accelerate to 60 from 40-50, when I push down the gas pedal, more often than not nothing happens until after I push down harder, and afterwards the engine revs at a noticeably higher rpm than before (there's no tachometer on my car, so I can't give an exact number) and I accelerate a bit faster than I originally intended.  Is this because there's something clogging up the fuel system, possible engine sludge, maybe both?  Or is there something else that would be wrong here?  Thanks in advance.

Joe

5 Answers

65

sounds like the tps is bad, the tps and iac work together to control the amount of gas being sent to the motor in the proper proportions. periodically when the tps goes bad it will not throw a code because it is not quite out of range. the iac will over compensate causing the surge. have a scan done to get the tps voltage under load you should be able to see if it is in the right range.

2 out of 2 people think this is helpful.
10

The thing is I can accelerate normally if I do it slowly. If I try accelerating from 0 to 60 slowly and gradually, there is very little if not no surge at all. It really only happens when I'm already moving and want to speed up to 60mph

1 out of 1 people think this is helpful.
65

the problem is at the end of the range not the beginning, your problem sounds like a classic symptom. if you want to try the basic maintenance stuff first to see if that helps be my guest. start with a fuel filter, an oil change with Rislone or seafoam or marvel mystery or any other cleaner, then throw a can of seafoam in the gas tank to clean the injectors.

95

beening a mechanic, (and im late with this post) check for any codes stored in your pcm and or check for a blocked cat on your exhaust!! these get blocked on gm cars and it makes you car run slow (wont get out of its own way/have no @SS) if these are ok have your transmission checked out. make sure fluid good and red, all gears work.

1 out of 1 people think this is helpful.

Put in a new coarse air filter. You can cut one out from a re-usable air conditioning filter. The engine will be more responsive and you will get 25 mpg in the city.

Your Answer

Add photo

Related Questions

Century

Looking for a Used Century in your area?

CarGurus has 1,076 nationwide Century listings and the tools to find you a great deal.

ZIP:

Search Buick Century Questions

Buick Century Experts

#1 John Saffrahn
John Saffrahn
Reputation 850
#2 Tom Demyan
Tom Demyan
Reputation 670
#3 John Pate
John Pate
Reputation 330
View All

Related Models For Sale

Used Buick LeSabre
11 Great Deals out of 2,357 listings starting at $1,768
Used Buick Regal
212 Great Deals out of 11,101 listings starting at $2,195
Used Chevrolet Impala
924 Great Deals out of 36,332 listings starting at $1,800
Used Buick Park Avenue
495 listings starting at $3,975
Used Honda Accord
1,189 Great Deals out of 77,640 listings starting at $969
Used Ford Taurus
353 Great Deals out of 22,342 listings starting at $1,499
Used Chevrolet Malibu
1,089 Great Deals out of 79,456 listings starting at $2,495
Used Pontiac Grand Prix
26 Great Deals out of 3,749 listings starting at $1,195
Used Toyota Camry
1,452 Great Deals out of 100,043 listings starting at $700
Used Nissan Altima
1,097 Great Deals out of 84,967 listings starting at $695
Used Honda Civic
1,140 Great Deals out of 65,603 listings starting at $1,500
Used Chevrolet Monte Carlo
16 Great Deals out of 1,728 listings starting at $1,695