A few times in the last couple months my '03 SVTF has started stuttering and bogging down while I am driving it. I will be driving along with either a cold, warm, or hot engine at city streets or highway speed and when I push the gas the engine will completely bog down and I will have to start slowing down.
When I pull over and give the car some gas it will pop and sputter a bunch while slowing going up to about 2K RPM where it will bog down and seem to not go past 2K, almost like I had a launch control on the car (I don't). If I let off the gas completely the engine will idle just fine and not die, eventually after a min or so it will 'wake up' and be back to its normal perky self. If I turn off the car while this is happening and turn it back on it will still be in the bogged down state, but will eventually wake up.
I have some new DENSO plugs on order since its about time to change them. Does anyone have any ideas on what I should look for? Electrical? Vacuum? Fuel?
The only mods to this car is a MagnaFlow cat-back.