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Old 10-15-2009, 12:49 AM   #61 (permalink)
teamroper60
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IMHO, you would be better served to spend that money on diagnosis and repair rather than the tuner. The chances of the tuner doing what you want are pretty slim until you find out why the engine is defueling (at least, that is what I think is happening).

Did you check fuel pressure? If not, you need to do that. I would not be surprised to learn it is low (below 45psi at heavy throttle).
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