My car used to startup first crank in the mornings, now it starts, then stumbles, and dies, but starts right back up? my air filter is recharged, in fairly good tune, except plugs and wires are a little old, any suggestions? tb and iab are clean.
One more question, i have an offroad h-pipe, and have the air tube intact, but have an old spark plug in the hole, but the back of the head needs to be plugged, anyone know a quick fix? and could i be leaking exhaust out the back of my head? cuz it sure sounds like its coming from somewhere around there.
thnx alot for the help given

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90 lx coupe: 5spd, energy susp trans mounts, fms hd clutch, Mac coldair fenderwell, Mac h-pipe, supercoil, ADS chip, 160 stat, aluminum D/S, Black magic fan, 3.27grs.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607
someday mods:4.10's, slicks.