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Engine Fades Then Surges
This is kind of a two part question. The background: 3400 with CAI, Pacesetter headers, 2.5 inch pipes, high flow cat, magnaflow resonator/muffler.
It only will fade and surge at very random times such as when I pull into a driveway, stop (it fades a bit) and then surges back. The idle and driving is great-smooth acceleration, no surging, RPMs at warm idle stay at 750 or so. Just makes we wonder if the airflow is such that the computer cannot adjust quickly enough to the random stop?
Which leads to the other question. If our computers will adjust the airflow ratio appropriately, is there even a point to tuning until you get a turbo, etc. (the crazy stuff)?
Would a tune secure the appropriate mix so things like this wouldn't happen?
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I am happy to say I have added more mods to my car than I have space to list. 
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