My car is running lean i changed the 02 sensor the mass airflow and fuel filter and I fit the vacuum leak what else can be wrong

Asked by Galvinray Mar 26, 2014 at 09:07 PM about the 1999 Buick Park Avenue Ultra FWD

Question type: Maintenance & Repair

2 Answers

130

Could possibly be the fuel pump itself or clogged injectors. You could rule out the fuel system itself by running a series or fuel pressure tests. Two main culprits of running lean, either 1)not enough fuel and 2) vacuum leaks allowing unmetered air into the system.

Best Answer Mark helpful

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:

CarGurus Experts

  • #1
    jateen29
    Reputation
    3,170
  • #2
    Joseph King
    Reputation
    2,040
  • #3
    Jim Campbell
    Reputation
    1,120
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Buick LeSabre
1 listing
Used Lincoln Continental
13 listings starting at $21,880
Used Chevrolet Impala
7 Great Deals out of 132 listings starting at $4,888
Used Buick Regal
5 Great Deals out of 29 listings starting at $6,995
Used Ford Crown Victoria
2 listings starting at $8,960
Used Ford F-150
318 Great Deals out of 13,660 listings starting at $3,800

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. Content will be removed if CarGurus becomes aware that it violates our policies.