electric problems? maybe?

99 Mustang

Problem is, once in a while (about once a week) when starting the car it will immediately stop attempting to crank for about 1-2 seconds, start cranking up and start right up, and all the gauges will flip from the 0 to full (all the gauges will do this) i have checked the following

Spark

Fuel

Compression

Air filter (New)

Starter voltage (a bit low, but within spec)

tore apart the steering column, everything looked O.K

Battery connections and terminals O.K no corrosion

Checked all the wiring i could, all tight no bad grounds anywhere i can see

No loose wiring

No bad wires

Timing is spot on, chain not worn.

Engine is good, 2 whole cranks no bindings

Computer is good, checked wiring to that as well, its good computer still active

anyone else have this problem and figure it out? it's driving me nuts i've looked just about everywhere i could think of to fix this everything is good and nothing sticks out to me saying "this is the problem" spark plugs are all gapped correctly, i've double checked them now, fuel injectors are firing correctly, i have great spark fuel pressure is almost perfect its 2 lb under average but nothing that signals its wrong, starter is good too the brushes are a bit worn but nothing that won't stand up for another year or so before even getting the idea of changing it its driving me nuts. i think its possible it may be the key FOB as it is the original key FOB from 99, but i'm not entirely sure of the life on the FOB any ideas?