1999 f250 sd v10. Getting po172 and po174 fuel trims out of wack. I have replaced iac tps cps fuel pump hoses the seemed bad no air leaks that I could find. Clean mas. Also tranney dot shift right

120

Asked by Joe Nov 16, 2013 at 09:54 PM about the 1999 Ford F-250 Super Duty XLT 4WD Crew Cab LB

Question type: Maintenance & Repair

I ordered a new mass I don't know what the maf should read at idle.  What else would
cause the fuel trims to be off. New o2 sensors.    Seems to run better with the mass low
unpluged. At least the bank 1 and 2 sensor 1 will switch rich lean.  When pluged in is
where the freeze.  And get 172 and 174 codes.  And during the koer test I get the iac
malfunction. Been replaced 2 times .

2 Answers
44,995

tuff4x4 answered 10 years ago

Rich on both banks. Coolant temp.sensor or fuel pressure regulator.

1 people found this helpful.
Mark helpful
44,995

tuff4x4 answered 10 years ago

Rear speed sensor in rear end or transmission filter dropped down.Change filter and fluid drain torque converter.

Mark helpful

Your Answer:

Related Questions

F-250 Super Duty

Looking for a Used F-250 Super Duty in your area?

CarGurus has 1,178 nationwide F-250 Super Duty listings starting at $8,995.

Postal Code:

Shortcuts

Search Ford F-250 Super Duty Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    3,650
  • #2
    NorCalEvan
    Reputation
    2,450
  • #3
    David Gray
    Reputation
    1,840
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
309 Great Deals out of 13,933 listings starting at $1,712
Used Ford F-350 Super Duty
38 Great Deals out of 2,698 listings starting at $6,996
Used Chevrolet Silverado 2500HD
27 Great Deals out of 1,241 listings starting at $9,500
Used Ford F-250
4 listings
Used Dodge RAM 2500
17 listings starting at $7,900
Used Chevrolet Silverado 1500
195 Great Deals out of 5,877 listings starting at $2,975
Used GMC Sierra 1500
128 Great Deals out of 6,516 listings starting at $3,975
Used Toyota Tundra
31 Great Deals out of 1,361 listings starting at $6,255
Used Ford F-450 Super Duty
152 listings starting at $22,777

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.