Been having an issue with my 94' cobra. Original 5.0, stock upper/lower, old autologic chip, SVO Aluminum heads, cammed, BBK Cold air. Runs great for the first 5-10 minutes, pulls really hard starting at 2300-2500 RPM, then when it gets warmer, I only make power around 3000+ RPM and it also feels like some power was lost. It even has a different exhaust tone. Any ideas?