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04 Lariat Missing for weeks!

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Old May 15, 2013 | 03:22 PM
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Michael Gross's Avatar
Michael Gross
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04 Lariat Missing for weeks!

Ok i've tried various other forums with no success, I bought 04 Lariat (5.4 3v around 100k miles, Roush Off Road side exit exhaust, DWV intake mod, SCT 3015 tuner).

The truck has had a miss on and off for around a month i've changed plugs and tested all the coils. Which cured the problem for around a week, the FPDM had some white stuff on back and soft spot but not ate through. The only Check Engine Lights have been bank 1 to lean (which went away as soon as it came. But yesterday and today i've got bank 2 to lean.

Below is a quick data log pull... PLEASE HELP the misses is about ready to ship her out if she dont straighten up..




 
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Old May 19, 2013 | 08:56 PM
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Sounds like you have a vacuum leak. What are your fuel trim numbers?
 
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Old May 31, 2013 | 03:08 AM
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they are listed in the pics lgft1&2 shrtft1&2
 
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