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 868 nationwide Century listings starting at $2,700.

ZIP:

Search Buick Century Questions

Buick Century Experts

#1 John Saffrahn
John Saffrahn
Reputation 910
#2 Tom Demyan
Tom Demyan
Reputation 730
#3 John Pate
John Pate
Reputation 440
View All

Related Models For Sale

Used Buick LeSabre
6 Great Deals out of 1,996 listings starting at $1,588
Used Buick Regal
101 Great Deals out of 10,259 listings starting at $3,495
Used Chevrolet Impala
594 Great Deals out of 29,130 listings starting at $1,300
Used Buick Park Avenue
446 listings starting at $3,500
Used Honda Accord
738 Great Deals out of 82,781 listings starting at $500
Used Ford Taurus
195 Great Deals out of 19,339 listings starting at $500
Used Toyota Camry
883 Great Deals out of 92,127 listings starting at $1,300
Used Chevrolet Malibu
809 Great Deals out of 88,732 listings starting at $1,900
Used Nissan Altima
805 Great Deals out of 78,280 listings starting at $470
Used Nissan Maxima
277 Great Deals out of 26,136 listings starting at $2,545
Used Lincoln Town Car
28 Great Deals out of 1,823 listings starting at $1,650
Used Pontiac Grand Prix
23 Great Deals out of 2,896 listings starting at $879

Used Cars For Sale

2004 Buick Century For Sale
65 listings starting at $2,700