l994 straight 6 f-150 will not pass emmissions testing, any ideas??

Asked by Jun 16, 2017 at 04:09 PM about the 1994 Ford F-150 XL 4WD LB

Question type: Maintenance & Repair

We bought the stuff and drove it many miles to get it through, still did not
pass. It said it would guarantee it to pass.  First time it has not passed.

5 Answers

1,630

Could be something as simple as a Gas Cap needing replacement. Ask the emission place to tell you what failed on the test.

74,565

Maybe it needs a tune up or a new catalytic converter. Why exactly did it fail? Visual? Hydrocarbons?

The fail was NOx(ppm), that is all it said.

895

A vehicle tat is producing High NOx counts. Is usually too lean. This could be caused by an exhaust leak before the catalytic converter. A faulty o2 sensor or sensors. A failed egr valve. incorrect ignition timing. The 1994 Ford inline engines had a pollution reduction system installed. A valve in that system could be stuck open admitting unneeded oxygen into the exhaust system.

20

Move out of California to a state or city that has no smog tests. Jerry Brown will hate you !

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 9,123 nationwide F-150 listings starting at $3,000.

Postal Code:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,760
  • #2
    dandyoun
    Reputation
    4,480
  • #3
    tennisshoes
    Reputation
    3,010
View All

Related Models For Sale

Used GMC Sierra 1500
235 Great Deals out of 10,481 listings starting at $2,995
Used Dodge Ram 1500
52 Great Deals out of 530 listings starting at $2,995
Used Toyota Tacoma
34 Great Deals out of 795 listings starting at $5,995
Used Ford F-250
4 listings
Used Ford Mustang
7 Great Deals out of 1,190 listings starting at $3,500
Used Ford Explorer
42 Great Deals out of 1,369 listings starting at $3,900
Used Chevrolet Tahoe
5 Great Deals out of 645 listings starting at $6,871

Used Cars For Sale

2018 Ford F-150 For Sale
292 listings starting at $35,799
2017 Ford F-150 For Sale
10 Great Deals out of 4,975 listings starting at $27,096
2016 Ford F-150 For Sale
55 Great Deals out of 769 listings starting at $19,995
2015 Ford F-150 For Sale
81 Great Deals out of 653 listings starting at $22,990
2014 Ford F-150 For Sale
81 Great Deals out of 520 listings starting at $11,995

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.