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2005 f 150 4.6 has -20% LTFT'S on both banks
- Patrickreaves
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5 years 7 months ago - 5 years 7 months ago #37536
by Patrickreaves
Replied by Patrickreaves on topic Re:2005 f 150 4.6 has -20% LTFT'S on both banks
Lol, i have been ready to get it fixed for the last year.
I went to auto zone to get thermostat, and 195 degrees , is the highest they sell, my current stat is a 192 degrees, ill look more tomorrow.
I have been thinking, and correct me if i'm wrong, but with blocking off crank case vapors my trims improve and go to -10% on both banks. is it possible that the white smoke is oil? because smoking at idle only, is a sign of bad valve seals right? At idle, vacuum will pull oil through the gaps in bad valve seals, and under load with no vacuum, it cant suck it in anymore. Remember, the truck only smokes after idling for a few minutes and then taking off. it fits the symptoms i think. and it would support the fuel contaminated oil theory. sucking oil at idle, may be the reason it stumbles while taking off from idle and why it runs good at WOT
If this were raw fuel, wouldn't it also smoke at WOT, where it would dump even more fuel into it? I don't know, maybe i'm reaching.
I pulled my plugs to see if it would reveal a clue . pics are down below. maybe someone can spot an issue on the plugs.
thanks
I went to auto zone to get thermostat, and 195 degrees , is the highest they sell, my current stat is a 192 degrees, ill look more tomorrow.
I have been thinking, and correct me if i'm wrong, but with blocking off crank case vapors my trims improve and go to -10% on both banks. is it possible that the white smoke is oil? because smoking at idle only, is a sign of bad valve seals right? At idle, vacuum will pull oil through the gaps in bad valve seals, and under load with no vacuum, it cant suck it in anymore. Remember, the truck only smokes after idling for a few minutes and then taking off. it fits the symptoms i think. and it would support the fuel contaminated oil theory. sucking oil at idle, may be the reason it stumbles while taking off from idle and why it runs good at WOT
If this were raw fuel, wouldn't it also smoke at WOT, where it would dump even more fuel into it? I don't know, maybe i'm reaching.
I pulled my plugs to see if it would reveal a clue . pics are down below. maybe someone can spot an issue on the plugs.
thanks
Last edit: 5 years 7 months ago by Patrickreaves.
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