it seems after i fly down a street for a ways or after i take a cruise at a steady high speed (45 and up) once i come to a stop and go to accelerate, my car bogs and stumbles for about three seconds, and almost dies. this is totally embarrasing. it seems as if something is totally drained of all of its power after the drive and its got no more left in it. is this a spark problem? my mods are in the sig.

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1987 LG4 Camaro z28
Mods- 80 series flowmaster, k&n filtercharger, open air element, high flow cat, 180* stat, edelbrock performer intake, msd blaster coil, ascd big block hood, panasonic cd player, rockford everything else.