01 Expedition 5.4 with P0171 and P0301 codes
20

Asked by taylormfdavis Apr 01, 2019 at 06:48 PM about the 2001 Ford Expedition Eddie Bauer 4WD

Question type: Maintenance & Repair

I have a 2001 Expedition with a 5.4 and
227,000 miles on it, been having all kinds of
misfire problems the past year. The latest is
it’s running lean on bank 1 and misfire on
cylinder 1. Put in new plug and coil on 1. Also
had a crack on PCV elbow so put in new
PCV valve and elbow, ran fine for about a
week then started misfiring again. Same
codes, P0171 and P0301. Checked for
vacuum leaks, cleaned Mass Airflow Sensor,
changed air filter and put in another new coil
and plug in 1. It’s not idling rough anymore
but shaking like hell when I’m 20-30 mph and
then smooths out once I get closer to 40
mph. Code hasn’t popped back up yet since
I unhooked battery to chang coil and plug.
Any ideas? I’m beyond stumped. Thanks!

2 Answers
41,855

Auto_Centric answered 5 years ago

Do a leak down test on engine not the old school compression test. Read about it https://shop.advanceautoparts.com/r/car-projects/leak-down-test-what-is-it-and-how-to-do-it Also with high miles the timing chain and VCT system is typically ready for rebuilding

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

Expedition

Looking for a Used Expedition in your area?

CarGurus has 656 nationwide Expedition listings starting at $7,894.

Postal Code:

Shortcuts

Search Ford Expedition Questions

CarGurus Experts

  • #1
    Larry Sturgis
    Reputation
    5,240
  • #2
    T_S_T
    Reputation
    4,540
  • #3
    Gene Arnett
    Reputation
    2,710
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
20 Great Deals out of 774 listings starting at $7,499
Used Chevrolet Suburban
3 Great Deals out of 524 listings starting at $8,000
Used Lincoln Navigator
8 Great Deals out of 293 listings starting at $16,990
Used Ford Explorer
59 Great Deals out of 1,907 listings starting at $6,990
Used GMC Yukon
17 Great Deals out of 934 listings starting at $5,890
Used Ford F-150
311 Great Deals out of 13,471 listings starting at $4,888
Used GMC Yukon XL
11 Great Deals out of 701 listings starting at $9,999
Used Toyota Sequoia
9 Great Deals out of 59 listings starting at $19,990
Used Cadillac Escalade
10 Great Deals out of 463 listings starting at $4,995
Used Toyota 4Runner
20 Great Deals out of 536 listings starting at $7,770
Used Ford F-250 Super Duty
34 Great Deals out of 777 listings starting at $2,890
Used Dodge Durango
57 Great Deals out of 1,822 listings starting at $6,987
Used Chevrolet Silverado 1500
176 Great Deals out of 7,546 listings starting at $7,777

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.