2003 Lincoln Navigator bucking and Shutting off. Need Help!

Asked by Jun 29, 2015 at 02:04 PM about the 2003 Lincoln Navigator Luxury 4WD

Question type: Maintenance & Repair

Hello,
My wife has a 2003 lincoln navigator. We have a problem with the car bucking. The
truck now will buck and then run really rough and struggle to maintain speed.
Sometimes, if I let off the throttle, it will stall. Once the car shuts off and I restart it,
the car runs great. Once in a while, I will  get a check engine light. Plugging in the
scanner tells me that we have 4 bad coil packs. I don't believe it. I tried changing tps
and the fuel filter. Everything else is too expensive to just start replacing parts on a
guess. Also, the truck seems to run great until it warms up, a few miles on the
highway. Then the problems start. Anyone have any suggestions? Dealer is just too
expensive and they will just replace everything and charge me a fortune to do it.

3 Answers

19,150

No promises but did you check your air filter and clean your throttle body with throttle body cleaner spray and also add fuel injector cleaner to gas tank then take out on road and hit the passing gear a few times that will help clean the fuel injectors and clean out the carbon build up.

Thanks for the suggestion. If it were dirty, wouldn't the truck give me headaches even before it warmed up? It runs really well until I put a few miles on highway.

19,150

Just some suggestions to try but I believe your check engine code reading is right ? Usually the code reading is right. Bad coil packs.

Your Answer

Add photo

Related Questions

  • 2003 Lincoln Navigator bucking and Shutting off. Need Help! 3 answers

    Hello, My wife has a 2003 lincoln navigator. We have a problem with the car bucking. The truck now will buck and then run really rough and struggle to maintain speed. Sometimes, if I let off the thr...

    2003 Lincoln Navigator Luxury 4WD

    -

    Maintenance & Repair

  • 2003 lincoln navigator 4 answers

    hello need some help figuring out this problem with my navi i already rebuilt the entire engine top to bottom changed fuel filter the tps ok anyways anyone no why my navi doesnt shift to passing ...

    2003 Lincoln Navigator Base

    -

    Maintenance & Repair

  • 2003 lincoln navigator 1 answer

    need some good answers please dont know wat to do anymore with this truck i just rebuild the entire engine on this navigator and it still feels like if it doesnt have balls and its stressing the he...

    2003 Lincoln Navigator Base

    -

    Maintenance & Repair

  • 1999 Lincoln navigator sputtering and slight lose in power 2 answers

    my 1999 navi sputters whjile driving and slight lose in power. the temp gauge rises when I drive n falls when I slow or come to a complete stop

    1999 Lincoln Navigator 4 Dr STD 4WD SUV

    -

    Maintenance & Repair

  • Blend Door 2002 lincoln Navigator 2 answers

    WHEN I TURN ON THE HEAT IN MY 2002 LINCOLN NAVIGATOR ITS BLOWS COLD AIR WHEN I TURN ON THE HEAT ON FOR MIDDLE AND BACK SECTION OF THE VEHICLE IT BLOW HEAT COULD IT BE ONE OF THE BLEND DOOR STUCK?

    2002 Lincoln Navigator Base

    -

    Maintenance & Repair

Navigator

Looking for a Used Navigator in your area?

CarGurus has 5,645 nationwide Navigator listings starting at $1,900.

ZIP:

Search Lincoln Navigator Questions

Lincoln Navigator Experts

#1 jimmyarango
jimmyarango
Reputation 1,490
#2 T_S_T
T_S_T
Reputation 430
#3 dandyoun
dandyoun
Reputation 320
View All

Related Models For Sale

Used Ford Expedition
399 Great Deals out of 24,014 listings starting at $1,500
Used Cadillac Escalade
200 Great Deals out of 11,013 listings starting at $2,500
Used Chevrolet Tahoe
584 Great Deals out of 33,059 listings starting at $1,500
Used Chevrolet Suburban
272 Great Deals out of 19,282 listings starting at $1,999
Used GMC Yukon
419 Great Deals out of 20,516 listings starting at $1,495
Used GMC Yukon XL
225 Great Deals out of 12,639 listings starting at $1,495
Used Cadillac Escalade ESV
105 Great Deals out of 5,350 listings starting at $3,900
Used Ford Explorer
911 Great Deals out of 64,632 listings starting at $799
Used Ford F-150
2,149 Great Deals out of 193,918 listings starting at $290
Used Nissan Armada
152 Great Deals out of 9,186 listings starting at $2,991
Used INFINITI QX56
61 Great Deals out of 1,318 listings starting at $3,500
Used Lincoln Aviator
10 Great Deals out of 224 listings starting at $2,500
Used Dodge Durango
268 Great Deals out of 21,222 listings starting at $1,500
Used Toyota Sequoia
120 Great Deals out of 5,368 listings starting at $2,650

Used Cars For Sale

2017 Lincoln Navigator For Sale
3 Great Deals out of 3,194 listings starting at $44,996
2016 Lincoln Navigator For Sale
7 Great Deals out of 407 listings starting at $35,995
2015 Lincoln Navigator For Sale
4 Great Deals out of 215 listings starting at $26,998
2014 Lincoln Navigator For Sale
10 Great Deals out of 182 listings starting at $20,995

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.