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  1. R

    1989 Mustang 5.0, Sputters and Smokes at High RPM

    I have a 89 5.0. Mods are: aluminum heads, rockers, headers, 75MM TB, Fuel pressure regulator, 190 lphr fuel pump, hypertech chip, 373 gears. My question is my care runs great under normal conditions but when I really get on it and put it to the floor it feels like a sputtering or no power at...
  2. R

    1989 Mustang 5.0, Sputters and Smokes at High RPM

    I have a 89 5.0. Mods are: aluminum heads, rockers, headers, 75MM TB, Fuel pressure regulator, 190 lphr fuel pump, hypertech chip, 373 gears. My question is my care runs great under normal conditions but when I really get on it and put it to the floor it feels like a sputtering or no power at...