mxl4729
New Member
- Joined
- Dec 21, 2021
- Messages
- 11
- Reaction score
- 7
- Points
- 3
- Location
- churchville MD
- Vehicle Year
- 2008
- Make / Model
- ford ranger
- Transmission
- Automatic
i bought a 2008 ford ranger 3.0 with 90K miles a few years ago.
the truck ran ok but seems to run a little rough at idle and lacks power but that my just be because it has the 3.0
well when running the code scanner the long term fuel trim in bank 1 and 2 are high at idle. Bank 1 is around 15.6% and bank two is 17.9%
when the truck is under load close to flooring it 96% load the long term fuel trim drops to around bank 1 9.3% and bank 2 10.1%
short term fuel trims seem to hover around 0 like it should all the time.
these high long term fuel trims made me thing i had a vacuum leak and or bad MAFS. I cleaned the MAFS and then replaced it with no change in LTFT. next i did a smoke test and the only place i had any smoke was the EGR valve. i replaced it and the new one seems to smoke the same amount so i don't think that's the source of my leak.
I checked my fuel pressure that that seemed good as well. I am kind of stumped. i would think under load at high RPM the LTFT would drop more then 7% or so but i don't know what it should be doing.
Based on the attached graph and the info above would you agree i have a small vacuum leak?
anyone have any ideas that i should be checking on the 3.0?
image below is no load at idle
Image below is almost full load
,,,
the truck ran ok but seems to run a little rough at idle and lacks power but that my just be because it has the 3.0
well when running the code scanner the long term fuel trim in bank 1 and 2 are high at idle. Bank 1 is around 15.6% and bank two is 17.9%
when the truck is under load close to flooring it 96% load the long term fuel trim drops to around bank 1 9.3% and bank 2 10.1%
short term fuel trims seem to hover around 0 like it should all the time.
these high long term fuel trims made me thing i had a vacuum leak and or bad MAFS. I cleaned the MAFS and then replaced it with no change in LTFT. next i did a smoke test and the only place i had any smoke was the EGR valve. i replaced it and the new one seems to smoke the same amount so i don't think that's the source of my leak.
I checked my fuel pressure that that seemed good as well. I am kind of stumped. i would think under load at high RPM the LTFT would drop more then 7% or so but i don't know what it should be doing.
Based on the attached graph and the info above would you agree i have a small vacuum leak?
anyone have any ideas that i should be checking on the 3.0?
image below is no load at idle
Image below is almost full load