1999 Le Sabre misfires engine light on and off
60

Asked by STLcookie Mar 29, 2015 at 05:40 PM about the 1999 Buick LeSabre Custom Sedan FWD

Question type: Maintenance & Repair

Car began missing during a ong drive two weeks ago. Minor missing with no check
engine light. Progressively got worse. Checked for vacuum leaks, none. Coil pack,
has constant flashing using spark indicator. Check engine light came on with code
p0300. Irregular intermittent misfire. Last July 2014 I replaced the upper intake
manifold with new gaskets on the lower.New PCV, IAC and MAP. The car ran great
for 8 months. Changed Mass air flow 3 years ago, ECM 4 years ago.The plugs had
over 80,000 miles so I changed them today. One was cracked #6. Now the car runs
very bad with a flashing check engine light. I shut down and I am looking for help.

3 Answers
60

STLcookie answered 9 years ago

Did not change plug wires. Irregular misfires have changed to a constant misfire. Dumping gas into exhaust and I think this is making the check engine light flash. Not sure how to check resistance on coil packs. .

4 people found this helpful.
Mark helpful
60

STLcookie answered 9 years ago

Thank You Jim, Started over checking everything except the plug wires (on purpose). Changed plug wires upon your recommendation and, new engine. I;ll add this to the must do column when doing this work again. Best of luck, Randy

2 people found this helpful.
Mark helpful
10

GuruXF1ZC answered 5 years ago

When my 2002 Buick lasbra read that I had multiple misfire it was the ingintion modular That the coil packs sit on

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1999 Le Sabre misfires engine light on and off 3 Answers

    Car began missing during a ong drive two weeks ago. Minor missing with no check engine light. Progressively got worse. Checked for vacuum leaks, none. Coil pack, has constant flashing using spark in...

    1999 Buick LeSabre Custom Sedan FWD

    -

    Maintenance & Repair

  • 2006 Le Sabre Buick fuse for reading lights, right tail light, and lights for heater keeps blowing. This has been rewired but keeps blowing. 2 Answers

    2006 Le Sabre Buick fuse for reading lights, right tail light, and lights for heater keeps blowing. This has been rewired but keeps blowing. Yes this is a 2006. The year will not go up any higher.

    2005 Buick LeSabre Custom Sedan FWD

    -

    Maintenance & Repair

  • 2004 Le Sabre horn troubleshooting 1 Answer

    2004 Le Sabre with horn that does not work. Checked and swapped out fuse (with spare), but this does not fix the problem. I see there is also a horn relay and have located it; but do not know how to...

    2004 Buick LeSabre

    -

    Maintenance & Repair

  • 1997 Buick Le Sabre Limited 1 Answer

    automatic windows and mirrors

    1997 Buick LeSabre Limited Sedan FWD

    -

    Maintenance & Repair

  • 1994 Buick le sabre issue 1 Answer

    Something is draining my battery so I make sure everything is off in the car and so I will not need a jump in the morning I unhook my battery and I notice when I hook my battery back up the front ...

    1994 Buick LeSabre Custom Sedan FWD

    -

    Maintenance & Repair

LeSabre

Looking for a Used LeSabre in your area?

CarGurus has 1 nationwide LeSabre listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Buick LeSabre Questions

CarGurus Experts

  • #1
    John Saffrahn
    Reputation
    4,040
  • #2
    txbarney
    Reputation
    3,170
  • #3
    joes098
    Reputation
    2,700
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Buick Regal
23 listings starting at $6,395
Used Ford Crown Victoria
4 listings starting at $8,960
Used Lexus RX
38 Great Deals out of 1,119 listings starting at $4,995
Used Buick Century
4 listings
Used Chevrolet Silverado 1500
169 Great Deals out of 7,405 listings starting at $6,995
Used Toyota Camry
49 Great Deals out of 1,110 listings starting at $2,500
Used Chevrolet Impala
5 Great Deals out of 129 listings starting at $3,495
Used Honda Accord
50 Great Deals out of 965 listings starting at $2,995
Used GMC Sierra 1500
124 Great Deals out of 7,846 listings starting at $5,500
Used Lexus LS
3 Great Deals out of 33 listings starting at $5,995

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.