Posted by jim on 6/25/2007, 5:48 pm, in reply to "Still stumbling/bogging out" BTW, did you check the output of the MAF with a scope to verify that you aren't going full lean when this happens?
71.60.72.188
This sounds electrical all the way. It sounds as if it is load sensitive, which can be plugs, wires, cap/rotor. Don't rule out coils and ignition modules, as these are also load-dependent items. Secondary voltage requirement increases as cylinder pressure increases, which is why it will do it when accelerating. Primary current also increases under load which is why a coil and/or ignitor can be the blame for this condition as many Ford owners found out in the late 80s into the mid 90s.
Don't waste you money on Nology snake-oil wires or other such garbage. Also, platinum, Split-Fire MSD and other gimmick plugs do nothing for you. I use a 99 cent Bosch plug in my supercharged S4 and they work fine (note: I use AC R42XLS plugs in my Shelby Charger that makes 28PSI boost, so AC plugs aren't as cheap as you think! I haven't found a better plug at that boost level yet).
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