Buick Park Avenue hesitating/missing under hard acceleration


Asked by Apr 08, 2017 at 07:24 PM about the 2002 Buick Park Avenue FWD

Question type: Maintenance & Repair

I have a 2002 Buick Park Avenue with 140,000 miles on it.  The car has always
run beautifully until a few days ago when it started hesitating and missing
under hard acceleration on a warm engine.   Under light and normal
acceleration there's no problem at all.  At first, this only happened for a split
second at take off from a standstill, but now it hesitates and cuts out all the
way up until the car reaches cruising speed before the problem disappears.

Some things to consider:

--This only happens when the engine is warm. It doesn't happen at all when
the engine is cold.

--Happens in all gears including park (if I'm sitting still and stab the pedal

--The Check Engine light is NOT on.

--The car was recently smog checked and passed (California emissions test),
so the catalytic converter is fine.

--Was just in Mexico with the car on a long trip, had to buy their gasoline,
figured that was the problem, but I've refueled with high-octane U.S. gasoline,
used additives, and the problem continues to get worse.

--Fuel economy is great at 30 MPG, passing on the highway is fine, idles

I'm thinking the problem could be plugs and wires, but I'm not entirely certain.  
Any ideas would be appreciated.

3 Answers


Could be the thermostat also


Have Cat checked for partial blockage ,,, I've seen 3 GM's with no codes showing that had your problem, One guy even had his transmission rebuilt. At lower engine speeds a partial restriction probably will go unnoticed but when your pushing lots of exhaust out a partial blockage will choke an engine. Having your back pressure checked is the less costly of all repairs and could save you the most money

1 people found this helpful.

Thank you. This is certainly a possibility and I'll have it examined. The problem has gotten worse in the last 24 hours. It's now hesitating at all speeds when the accelerator is depressed, the fuel economy is getting worse, there's a rattling noise under the car when cold and the exhaust has a slight odor I've never smelled before. All signs look like they're pointing the the cat, as you've suggested.

Your Answer:

Park Avenue

Looking for a Used Park Avenue in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:


Buick Park Avenue Experts

  • #1
  • #2
  • #3
    Tom Demyan
View All

Related Models For Sale

Used Buick LeSabre
6 listings
Used Buick Regal
3 Great Deals out of 140 listings starting at $6,988
Used Chevrolet Impala
19 Great Deals out of 883 listings starting at $2,894
Used Lincoln Town Car
9 listings starting at $6,495
Used Buick Century
10 listings
Used Chevrolet Tahoe
11 Great Deals out of 782 listings starting at $5,900
Used Cadillac DeVille
14 listings
Used Honda Accord
38 Great Deals out of 1,638 listings starting at $3,490
Used Toyota Camry
40 Great Deals out of 2,123 listings starting at $2,450

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.