why would my '99 buick regal suddenly get approximately 100 miles less a tank?

Asked by vallanX Dec 01, 2016 at 08:21 PM about the 1999 Buick Regal GS Sedan FWD

Question type: Maintenance & Repair

same route every day, regular maintenance, I used to get about 350miles to
the tank and now suddenly I get about 220 miles to the tank. What is wrong
and how do I fix it?

1 Answer
10,220

txbarney answered 7 years ago

I have had the knock sensor go haywire and it was sending a way high signal to the ECM causing the ECM to retart the timing all the time...this affected performance and gas mileage

Mark helpful

Your Answer:

Related Questions

  • why would my '99 buick regal suddenly get approximately 100 miles less a tank? 1 Answer

    same route every day, regular maintenance, I used to get about 350miles to the tank and now suddenly I get about 220 miles to the tank. What is wrong and how do I fix it?

    1999 Buick Regal GS Sedan FWD

    -

    Maintenance & Repair

  • Buick Regal 2 Answers

    Can I replace the 3.8 in my Buick Regal with a 3.3?

    1989 Buick Regal Custom Coupe RWD

    -

    Maintenance & Repair

  • buick regal 4 Answers

    I have a 2000 buick regal and the air conditioner doesnt work,anybody know anything about that

    2000 Buick Regal

    -

    Maintenance & Repair

  • How do I adjust my door on a 1992 Buick Regal so it will close tighter against the seals? 3 Answers

    This car is a 1992 Buick Regal Gran Sport. 2 Door. Every time it rains I get a bunch of water in the floorboard of my car. Floorboard meaning passenger side rear, Driver side rear and driver side fron...

    1992 Buick Regal Gran Sport Coupe FWD

    -

    Maintenance & Repair

  • what wrong with my 2014 buick regal 1 Answer

    so I am trying to pass smog and everything is ready except for the oxygen sensor ( not the heated one) the car has been driven over 100 miles I have notice on my scanner the oxgen read on the low en...

    2014 Buick Regal Sedan FWD

    -

    Maintenance & Repair

Own this car?

Share your experience with others.

1999 Buick Regal

Write a car review

Review another car

Shortcuts

Search Buick Regal Questions

CarGurus Experts

  • #1
    james sparrow
    Reputation
    760
  • #2
    dvigano
    Reputation
    630
  • #3
    Tom Harmon
    Reputation
    460
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Impala
286 Great Deals out of 4,049 listings starting at $500
Used Honda Accord
1,571 Great Deals out of 29,785 listings starting at $500
Used Chevrolet Malibu
1,017 Great Deals out of 19,878 listings starting at $700
Used Chevrolet Monte Carlo
3 Great Deals out of 208 listings starting at $2,900
Used Ford Mustang
944 Great Deals out of 22,717 listings starting at $1,100
Used Chevrolet Camaro
617 Great Deals out of 9,294 listings starting at $4,899
Used Toyota Camry
2,047 Great Deals out of 35,547 listings starting at $500
Used Ford F-150
6,192 Great Deals out of 133,581 listings starting at $1,100
Used Buick LeSabre
8 Great Deals out of 190 listings starting at $1,895
Used Chevrolet Corvette
724 Great Deals out of 12,358 listings starting at $4,995

Used Cars For Sale

2017 Buick Regal GS Sedan FWD For Sale
4 listings starting at $14,325
2016 Buick Regal GS Sedan FWD For Sale
9 listings starting at $8,995
2015 Buick Regal GS Sedan FWD For Sale
5 listings starting at $12,444
2014 Buick Regal GS Sedan FWD For Sale
1 listing
2013 Buick Regal GS Sedan FWD For Sale
7 listings starting at $7,900

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.