the starting related problem may be your IAC
as for mpg that would be either ignition related or intake realated. if you have not done it already you should do the upper and lower intake manifold cleaning/rebuild that helps some
the mis-reading speedo could be the either from wheels that aren't the right size or a bad speed sensor
98.5 Black SE ATX
S&B filter, SVT MAF, optimized SVT TB, mesh grille, removed orange reflectors, painted rear reflector, gutted pre-cats, optimized SVT LIM, 19lb injectors, resonator removed
cant afford an svt but lookin for 1 in nc
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